1020320340550 has 24 divisors (see below), whose sum is σ = 2168909524656. Its totient is φ = 349824116640.

The previous prime is 1020320340511. The next prime is 1020320340671. The reversal of 1020320340550 is 550430230201.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1457600137 + ... + 1457600836.

It is an arithmetic number, because the mean of its divisors is an integer number (90371230194).

Almost surely, 2^{1020320340550} is an apocalyptic number.

1020320340550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020320340550 is an abundant number, since it is smaller than the sum of its proper divisors (1148589184106).

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

1020320340550 is a wasteful number, since it uses less digits than its factorization.

1020320340550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2915200992 (or 2915200987 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 1020320340550 its reverse (550430230201), we get a palindrome (1570750570751).

The spelling of 1020320340550 in words is "one trillion, twenty billion, three hundred twenty million, three hundred forty thousand, five hundred fifty".