20613893504 has 32 divisors (see below), whose sum is σ = 41281799040. Its totient is φ = 10252971520.

The previous prime is 20613893491. The next prime is 20613893537. The reversal of 20613893504 is 40539831602.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397139 + ... + 446034.

It is an arithmetic number, because the mean of its divisors is an integer number (1290056220).

Almost surely, 2^20613893504 is an apocalyptic number.

It is an amenable number.

20613893504 is an abundant number, since it is smaller than the sum of its proper divisors (20667905536).

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

20613893504 is an equidigital number, since it uses as much as digits as its factorization.

20613893504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843378 (or 843366 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 20613893504 in words is "twenty billion, six hundred thirteen million, eight hundred ninety-three thousand, five hundred four".