13939799920 has 80 divisors (see below), whose sum is σ = 34948075680. Its totient is φ = 5153587200.

The previous prime is 13939799903. The next prime is 13939799933. The reversal of 13939799920 is 2999793931.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49521 + ... + 174160.

It is an arithmetic number, because the mean of its divisors is an integer number (436850946).

Almost surely, 2^13939799920 is an apocalyptic number.

13939799920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13939799920 is an abundant number, since it is smaller than the sum of its proper divisors (21008275760).

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

13939799920 is a wasteful number, since it uses less digits than its factorization.

13939799920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223754 (or 223748 counting only the distinct ones).

The product of its (nonzero) digits is 7440174, while the sum is 61.

The spelling of 13939799920 in words is "thirteen billion, nine hundred thirty-nine million, seven hundred ninety-nine thousand, nine hundred twenty".