13691690418 has 32 divisors (see below), whose sum is σ = 33136193664. Its totient is φ = 3681798912.

The previous prime is 13691690417. The next prime is 13691690443. The reversal of 13691690418 is 81409619631.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13691690417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9587305 + ... + 9588732.

It is an arithmetic number, because the mean of its divisors is an integer number (1035506052).

Almost surely, 2^13691690418 is an apocalyptic number.

13691690418 is an abundant number, since it is smaller than the sum of its proper divisors (19444503246).

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

13691690418 is a wasteful number, since it uses less digits than its factorization.

13691690418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19176066.

The product of its (nonzero) digits is 279936, while the sum is 48.

The spelling of 13691690418 in words is "thirteen billion, six hundred ninety-one million, six hundred ninety thousand, four hundred eighteen".