1020503318400 has 960 divisors, whose sum is σ = 3930087744000. Its totient is φ = 260437524480.

The previous prime is 1020503318389. The next prime is 1020503318407. The reversal of 1020503318400 is 48133050201.

It is a happy number.

1020503318400 is a `hidden beast` number, since 10 + 205 + 0 + 33 + 18 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020503318407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 954633066 + ... + 954634134.

It is an arithmetic number, because the mean of its divisors is an integer number (4093841400).

Almost surely, 2^{1020503318400} is an apocalyptic number.

1020503318400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020503318400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1965043872000).

1020503318400 is an abundant number, since it is smaller than the sum of its proper divisors (2909584425600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1020503318400 is a wasteful number, since it uses less digits than its factorization.

1020503318400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1235 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1020503318400 its reverse (48133050201), we get a palindrome (1068636368601).

The spelling of 1020503318400 in words is "one trillion, twenty billion, five hundred three million, three hundred eighteen thousand, four hundred".