20532421625 has 16 divisors (see below), whose sum is σ = 25695895680. Its totient is φ = 16380146800.

The previous prime is 20532421621. The next prime is 20532421639. The reversal of 20532421625 is 52612423502.

It is not a de Polignac number, because 20532421625 - 2² = 20532421621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20532421591 and 20532421600.

It is not an unprimeable number, because it can be changed into a prime (20532421621) 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, 183899 + ... + 273648.

It is an arithmetic number, because the mean of its divisors is an integer number (1605993480).

Almost surely, 2^20532421625 is an apocalyptic number.

20532421625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20532421625 is a deficient number, since it is larger than the sum of its proper divisors (5163474055).

20532421625 is an equidigital number, since it uses as much as digits as its factorization.

20532421625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457921 (or 457911 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 20532421625 in words is "twenty billion, five hundred thirty-two million, four hundred twenty-one thousand, six hundred twenty-five".