13992013520 has 40 divisors (see below), whose sum is σ = 32541703656. Its totient is φ = 5595038208.

The previous prime is 13992013517. The next prime is 13992013537. The reversal of 13992013520 is 2531029931.

It can be written as a sum of positive squares in 4 ways, for example, as 9603216016 + 4388797504 = 97996^2 + 66248^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 243914 + ... + 295766.

Almost surely, 2^13992013520 is an apocalyptic number.

13992013520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13992013520 is an abundant number, since it is smaller than the sum of its proper divisors (18549690136).

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

13992013520 is a wasteful number, since it uses less digits than its factorization.

13992013520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55239 (or 55233 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The spelling of 13992013520 in words is "thirteen billion, nine hundred ninety-two million, thirteen thousand, five hundred twenty".