13099920 has 40 divisors (see below), whose sum is σ = 40610496. Its totient is φ = 3493248.

The previous prime is 13099913. The next prime is 13099921. The reversal of 13099920 is 2999031.

13099920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (13099921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27052 + ... + 27531.

Almost surely, 2^13099920 is an apocalyptic number.

13099920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13099920 is an abundant number, since it is smaller than the sum of its proper divisors (27510576).

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

13099920 is a wasteful number, since it uses less digits than its factorization.

13099920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54599 (or 54593 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 13099920 is about 3619.3811625746. The cubic root of 13099920 is about 235.7343558930.

The spelling of 13099920 in words is "thirteen million, ninety-nine thousand, nine hundred twenty".