20125725347664 has 60 divisors (see below), whose sum is σ = 56326181161536. Its totient is φ = 6708324684096.

The previous prime is 20125725347653. The next prime is 20125725347719. The reversal of 20125725347664 is 46674352752102.

20125725347664 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 572 + 5 + 3 + 4 + 7 + 6 + 64 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20125725347664.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1282287 + ... + 6472689.

Almost surely, 2^{20125725347664} is an apocalyptic number.

20125725347664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20125725347664 is an abundant number, since it is smaller than the sum of its proper divisors (36200455813872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20125725347664 is a wasteful number, since it uses less digits than its factorization.

20125725347664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217344 (or 5217335 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 54.

The spelling of 20125725347664 in words is "twenty trillion, one hundred twenty-five billion, seven hundred twenty-five million, three hundred forty-seven thousand, six hundred sixty-four".