20513125546 has 16 divisors (see below), whose sum is σ = 31296847680. Its totient is φ = 10080905760.

The previous prime is 20513125541. The next prime is 20513125547. The reversal of 20513125546 is 64552131502.

It is not an unprimeable number, because it can be changed into a prime (20513125541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 838366 + ... + 862486.

It is an arithmetic number, because the mean of its divisors is an integer number (1956052980).

Almost surely, 2^20513125546 is an apocalyptic number.

20513125546 is a deficient number, since it is larger than the sum of its proper divisors (10783722134).

20513125546 is a wasteful number, since it uses less digits than its factorization.

20513125546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31389.

The product of its (nonzero) digits is 36000, while the sum is 34.

The spelling of 20513125546 in words is "twenty billion, five hundred thirteen million, one hundred twenty-five thousand, five hundred forty-six".