20125643465157 has 32 divisors (see below), whose sum is σ = 28507814332800. Its totient is φ = 12593366618112.

The previous prime is 20125643465143. The next prime is 20125643465167. The reversal of 20125643465157 is 75156434652102.

It is not a de Polignac number, because 20125643465157 - 2²³ = 20125635076549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125643465107) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 87071613 + ... + 87302445.

It is an arithmetic number, because the mean of its divisors is an integer number (890869197900).

Almost surely, 2^{20125643465157} is an apocalyptic number.

It is an amenable number.

20125643465157 is a deficient number, since it is larger than the sum of its proper divisors (8382170867643).

20125643465157 is a wasteful number, since it uses less digits than its factorization.

20125643465157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244997.

The product of its (nonzero) digits is 6048000, while the sum is 51.

The spelling of 20125643465157 in words is "twenty trillion, one hundred twenty-five billion, six hundred forty-three million, four hundred sixty-five thousand, one hundred fifty-seven".