20624406025 has 12 divisors (see below), whose sum is σ = 25625530000. Its totient is φ = 16466449680.

The previous prime is 20624406017. The next prime is 20624406031. The reversal of 20624406025 is 52060442602.

It is not a de Polignac number, because 20624406025 - 2³ = 20624406017 is a prime.

It is a super-2 number, since 2×20624406025² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 814155 + ... + 839104.

Almost surely, 2^20624406025 is an apocalyptic number.

20624406025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20624406025 is a deficient number, since it is larger than the sum of its proper divisors (5001123975).

20624406025 is a wasteful number, since it uses less digits than its factorization.

20624406025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653768 (or 1653763 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 20624406025 its reverse (52060442602), we get a palindrome (72684848627).

The spelling of 20624406025 in words is "twenty billion, six hundred twenty-four million, four hundred six thousand, twenty-five".