13118920 has 32 divisors (see below), whose sum is σ = 29719800. Its totient is φ = 5211648.

The previous prime is 13118909. The next prime is 13118923. The reversal of 13118920 is 2981131.

It can be written as a sum of positive squares in 4 ways, for example, as 11546404 + 1572516 = 3398^2 + 1254^2 .

It is not an unprimeable number, because it can be changed into a prime (13118923) 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, 5236 + ... + 7324.

Almost surely, 2^13118920 is an apocalyptic number.

13118920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13118920 is an abundant number, since it is smaller than the sum of its proper divisors (16600880).

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

13118920 is a wasteful number, since it uses less digits than its factorization.

13118920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2253 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 13118920 is about 3622.0049696266. The cubic root of 13118920 is about 235.8482697972.

The spelling of 13118920 in words is "thirteen million, one hundred eighteen thousand, nine hundred twenty".