20425500432021 has 16 divisors (see below), whose sum is σ = 28837667041344. Its totient is φ = 12815259634944.

The previous prime is 20425500431993. The next prime is 20425500432023. The reversal of 20425500432021 is 12023400552402.

It is not a de Polignac number, because 20425500432021 - 2⁵ = 20425500431989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20425500432021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20425500432023) 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 15 ways as a sum of consecutive naturals, for example, 10680615 + ... + 12446948.

It is an arithmetic number, because the mean of its divisors is an integer number (1802354190084).

Almost surely, 2^{20425500432021} is an apocalyptic number.

It is an amenable number.

20425500432021 is a deficient number, since it is larger than the sum of its proper divisors (8412166609323).

20425500432021 is a wasteful number, since it uses less digits than its factorization.

20425500432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23144900.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20425500432021 its reverse (12023400552402), we get a palindrome (32448900984423).

The spelling of 20425500432021 in words is "twenty trillion, four hundred twenty-five billion, five hundred million, four hundred thirty-two thousand, twenty-one".