20525112021 has 16 divisors (see below), whose sum is σ = 27655565504. Its totient is φ = 13539101184.

The previous prime is 20525112001. The next prime is 20525112037. The reversal of 20525112021 is 12021152502.

It is not a de Polignac number, because 20525112021 - 2⁵ = 20525111989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20525112001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2207835 + ... + 2217111.

It is an arithmetic number, because the mean of its divisors is an integer number (1728472844).

Almost surely, 2^20525112021 is an apocalyptic number.

It is an amenable number.

20525112021 is a deficient number, since it is larger than the sum of its proper divisors (7130453483).

20525112021 is an equidigital number, since it uses as much as digits as its factorization.

20525112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16980.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 20525112021 its reverse (12021152502), we get a palindrome (32546264523).

The spelling of 20525112021 in words is "twenty billion, five hundred twenty-five million, one hundred twelve thousand, twenty-one".