13381812 has 36 divisors (see below), whose sum is σ = 33939360. Its totient is φ = 4445712.

The previous prime is 13381807. The next prime is 13381813. The reversal of 13381812 is 21818331.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×13381812³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13381813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17739 + ... + 18477.

It is an arithmetic number, because the mean of its divisors is an integer number (942760).

Almost surely, 2^13381812 is an apocalyptic number.

13381812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13381812 is an abundant number, since it is smaller than the sum of its proper divisors (20557548).

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

13381812 is a wasteful number, since it uses less digits than its factorization.

13381812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1247 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 13381812 is about 3658.1159084972. The cubic root of 13381812 is about 237.4132617700.

The spelling of 13381812 in words is "thirteen million, three hundred eighty-one thousand, eight hundred twelve".