20937798518560 has 96 divisors (see below), whose sum is σ = 61671333854592. Its totient is φ = 6526067066880.

The previous prime is 20937798518551. The next prime is 20937798518563. The reversal of 20937798518560 is 6581589773902.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 20937798518560.

It is not an unprimeable number, because it can be changed into a prime (20937798518563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 849735997 + ... + 849760636.

It is an arithmetic number, because the mean of its divisors is an integer number (642409727652).

Almost surely, 2^{20937798518560} is an apocalyptic number.

20937798518560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20937798518560 is an abundant number, since it is smaller than the sum of its proper divisors (40733535336032).

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

20937798518560 is a wasteful number, since it uses less digits than its factorization.

20937798518560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699496666 (or 1699496658 counting only the distinct ones).

The product of its (nonzero) digits is 228614400, while the sum is 70.

The spelling of 20937798518560 in words is "twenty trillion, nine hundred thirty-seven billion, seven hundred ninety-eight million, five hundred eighteen thousand, five hundred sixty".