20858734288 has 40 divisors (see below), whose sum is σ = 46196315072. Its totient is φ = 8937692928.

The previous prime is 20858734241. The next prime is 20858734301. The reversal of 20858734288 is 88243785802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664156 + ... + 694852.

Almost surely, 2^20858734288 is an apocalyptic number.

20858734288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20858734288 is an abundant number, since it is smaller than the sum of its proper divisors (25337580784).

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

20858734288 is a wasteful number, since it uses less digits than its factorization.

20858734288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36779 (or 36773 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 55.

The spelling of 20858734288 in words is "twenty billion, eight hundred fifty-eight million, seven hundred thirty-four thousand, two hundred eighty-eight".