20125057504631 has 4 divisors (see below), whose sum is σ = 20125185221064. Its totient is φ = 20124929788200.

The previous prime is 20125057504597. The next prime is 20125057504661. The reversal of 20125057504631 is 13640575052102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20125057504631 is a prime.

It is a super-2 number, since 2×20125057504631² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125057504661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63621560 + ... + 63937101.

It is an arithmetic number, because the mean of its divisors is an integer number (5031296305266).

Almost surely, 2^{20125057504631} is an apocalyptic number.

20125057504631 is a deficient number, since it is larger than the sum of its proper divisors (127716433).

20125057504631 is a wasteful number, since it uses less digits than its factorization.

20125057504631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127716432.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 20125057504631 in words is "twenty trillion, one hundred twenty-five billion, fifty-seven million, five hundred four thousand, six hundred thirty-one".