20858618832 has 40 divisors (see below), whose sum is σ = 55622987520. Its totient is φ = 6728586240.

The previous prime is 20858618813. The next prime is 20858618839. The reversal of 20858618832 is 23881685802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858618839) 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, 7007457 + ... + 7010432.

It is an arithmetic number, because the mean of its divisors is an integer number (1390574688).

Almost surely, 2^20858618832 is an apocalyptic number.

It is an amenable number.

20858618832 is an abundant number, since it is smaller than the sum of its proper divisors (34764368688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20858618832 is a wasteful number, since it uses less digits than its factorization.

20858618832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14017931 (or 14017925 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 20858618832 in words is "twenty billion, eight hundred fifty-eight million, six hundred eighteen thousand, eight hundred thirty-two".