20420325102400 has 42 divisors (see below), whose sum is σ = 50246762459030. Its totient is φ = 8168130040320.

The previous prime is 20420325102379. The next prime is 20420325102409. The reversal of 20420325102400 is 420152302402.

It can be written as a sum of positive squares in 3 ways, for example, as 2962501900864 + 17457823201536 = 1721192^2 + 4178256^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20420325102409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6381349995 + ... + 6381353194.

Almost surely, 2^{20420325102400} is an apocalyptic number.

20420325102400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20420325102400 is an abundant number, since it is smaller than the sum of its proper divisors (29826437356630).

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

20420325102400 is a wasteful number, since it uses less digits than its factorization.

20420325102400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12762703211 (or 12762703196 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20420325102400 its reverse (420152302402), we get a palindrome (20840477404802).

The spelling of 20420325102400 in words is "twenty trillion, four hundred twenty billion, three hundred twenty-five million, one hundred two thousand, four hundred".