20506955624 has 16 divisors (see below), whose sum is σ = 38504030400. Its totient is φ = 10239214192.

The previous prime is 20506955587. The next prime is 20506955647. The reversal of 20506955624 is 42655960502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776842 + ... + 1788345.

It is an arithmetic number, because the mean of its divisors is an integer number (2406501900).

Almost surely, 2^20506955624 is an apocalyptic number.

It is an amenable number.

20506955624 is a deficient number, since it is larger than the sum of its proper divisors (17997074776).

20506955624 is a wasteful number, since it uses less digits than its factorization.

20506955624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565912 (or 3565908 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 20506955624 in words is "twenty billion, five hundred six million, nine hundred fifty-five thousand, six hundred twenty-four".