13811994 has 24 divisors (see below), whose sum is σ = 34201440. Its totient is φ = 3946248.

The previous prime is 13811977. The next prime is 13812011. The reversal of 13811994 is 49911831.

It is an interprime number because it is at equal distance from previous prime (13811977) and next prime (13812011).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54684 + ... + 54935.

It is an arithmetic number, because the mean of its divisors is an integer number (1425060).

Almost surely, 2^13811994 is an apocalyptic number.

13811994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

13811994 is an abundant number, since it is smaller than the sum of its proper divisors (20389446).

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

13811994 is a wasteful number, since it uses less digits than its factorization.

13811994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109634 (or 109631 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 13811994 is about 3716.4491117194. The cubic root of 13811994 is about 239.9305007096.

It can be divided in two parts, 1381 and 1994, that added together give a cube (3375 = 15³).

The spelling of 13811994 in words is "thirteen million, eight hundred eleven thousand, nine hundred ninety-four".