20479621625 has 64 divisors (see below), whose sum is σ = 27657676800. Its totient is φ = 15084160000.

The previous prime is 20479621577. The next prime is 20479621627. The reversal of 20479621625 is 52612697402.

It is not a de Polignac number, because 20479621625 - 2¹⁶ = 20479556089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20479621627) 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 63 ways as a sum of consecutive naturals, for example, 22479920 + ... + 22480830.

It is an arithmetic number, because the mean of its divisors is an integer number (432151200).

Almost surely, 2^20479621625 is an apocalyptic number.

20479621625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20479621625 is a deficient number, since it is larger than the sum of its proper divisors (7178055175).

20479621625 is a wasteful number, since it uses less digits than its factorization.

20479621625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 20479621625 in words is "twenty billion, four hundred seventy-nine million, six hundred twenty-one thousand, six hundred twenty-five".