13906818 has 24 divisors (see below), whose sum is σ = 30221100. Its totient is φ = 4621824.

The previous prime is 13906813. The next prime is 13906819. The reversal of 13906818 is 81860931.

It can be written as a sum of positive squares in 2 ways, for example, as 13155129 + 751689 = 3627^2 + 867^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13906813) 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, 6418 + ... + 8306.

Almost surely, 2^13906818 is an apocalyptic number.

13906818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13906818 is an abundant number, since it is smaller than the sum of its proper divisors (16314282).

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

13906818 is a wasteful number, since it uses less digits than its factorization.

13906818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 13906818 is about 3729.1846293795. The cubic root of 13906818 is about 240.4783169206.

The spelling of 13906818 in words is "thirteen million, nine hundred six thousand, eight hundred eighteen".