18014015838 has 64 divisors (see below), whose sum is σ = 44360289792. Its totient is φ = 4749010560.

The previous prime is 18014015821. The next prime is 18014015857. The reversal of 18014015838 is 83851041081.

It is a super-2 number, since 2×18014015838² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 18014015796 and 18014015805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1753545 + ... + 1763787.

It is an arithmetic number, because the mean of its divisors is an integer number (693129528).

Almost surely, 2^18014015838 is an apocalyptic number.

18014015838 is an abundant number, since it is smaller than the sum of its proper divisors (26346273954).

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

18014015838 is a wasteful number, since it uses less digits than its factorization.

18014015838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13489.

The product of its (nonzero) digits is 30720, while the sum is 39.

The spelling of 18014015838 in words is "eighteen billion, fourteen million, fifteen thousand, eight hundred thirty-eight".