20858557630 has 32 divisors (see below), whose sum is σ = 39187805184. Its totient is φ = 7978630176.

The previous prime is 20858557627. The next prime is 20858557649. The reversal of 20858557630 is 3675585802.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141627 + ... + 1159753.

It is an arithmetic number, because the mean of its divisors is an integer number (1224618912).

Almost surely, 2^20858557630 is an apocalyptic number.

20858557630 is a deficient number, since it is larger than the sum of its proper divisors (18329247554).

20858557630 is a wasteful number, since it uses less digits than its factorization.

20858557630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23160.

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 20858557630 in words is "twenty billion, eight hundred fifty-eight million, five hundred fifty-seven thousand, six hundred thirty".