13785620920 has 32 divisors (see below), whose sum is σ = 31044240720. Its totient is φ = 5509520640.

The previous prime is 13785620899. The next prime is 13785620951. The reversal of 13785620920 is 2902658731.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 100317 + ... + 193996.

Almost surely, 2^13785620920 is an apocalyptic number.

13785620920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13785620920 is an abundant number, since it is smaller than the sum of its proper divisors (17258619800).

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

13785620920 is a wasteful number, since it uses less digits than its factorization.

13785620920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295495 (or 295491 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 13785620920 in words is "thirteen billion, seven hundred eighty-five million, six hundred twenty thousand, nine hundred twenty".