20559913792 has 56 divisors (see below), whose sum is σ = 45593154432. Its totient is φ = 9117465600.

The previous prime is 20559913783. The next prime is 20559913823. The reversal of 20559913792 is 29731995502.

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, 327288 + ... + 385015.

It is an arithmetic number, because the mean of its divisors is an integer number (814163472).

Almost surely, 2^20559913792 is an apocalyptic number.

20559913792 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20559913792 is an abundant number, since it is smaller than the sum of its proper divisors (25033240640).

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

20559913792 is a wasteful number, since it uses less digits than its factorization.

20559913792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712367 (or 712357 counting only the distinct ones).

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 20559913792 in words is "twenty billion, five hundred fifty-nine million, nine hundred thirteen thousand, seven hundred ninety-two".