13810018815 has 12 divisors (see below), whose sum is σ = 23937366024. Its totient is φ = 7365343344.

The previous prime is 13810018813. The next prime is 13810018819. The reversal of 13810018815 is 51881001831.

It is a happy number.

It is not a de Polignac number, because 13810018815 - 2¹ = 13810018813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13810018815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13810018813) 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, 153444609 + ... + 153444698.

It is an arithmetic number, because the mean of its divisors is an integer number (1994780502).

Almost surely, 2^13810018815 is an apocalyptic number.

13810018815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13810018815 is a deficient number, since it is larger than the sum of its proper divisors (10127347209).

13810018815 is a wasteful number, since it uses less digits than its factorization.

13810018815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306889318 (or 306889315 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 36.

The spelling of 13810018815 in words is "thirteen billion, eight hundred ten million, eighteen thousand, eight hundred fifteen".