13051920 has 160 divisors (see below), whose sum is σ = 49068288. Its totient is φ = 2801664.

The previous prime is 13051891. The next prime is 13051933. The reversal of 13051920 is 2915031.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28332 + ... + 28788.

Almost surely, 2^13051920 is an apocalyptic number.

13051920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13051920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24534144).

13051920 is an abundant number, since it is smaller than the sum of its proper divisors (36016368).

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

13051920 is a wasteful number, since it uses less digits than its factorization.

13051920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 491 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 13051920 is about 3612.7441093994. The cubic root of 13051920 is about 235.4460819310.

Adding to 13051920 its reverse (2915031), we get a palindrome (15966951).

The spelling of 13051920 in words is "thirteen million, fifty-one thousand, nine hundred twenty".