13918533939 has 16 divisors (see below), whose sum is σ = 20622065440. Its totient is φ = 9278115840.

The previous prime is 13918533929. The next prime is 13918533949. The reversal of 13918533939 is 93933581931.

13918533939 is a `hidden beast` number, since 1 + 3 + 9 + 18 + 533 + 93 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (13918533929) and next prime (13918533949).

It is not a de Polignac number, because 13918533939 - 2⁸ = 13918533683 is a prime.

It is a super-2 number, since 2×13918533939² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13918533929) 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, 367539 + ... + 403635.

It is an arithmetic number, because the mean of its divisors is an integer number (1288879090).

Almost surely, 2^13918533939 is an apocalyptic number.

13918533939 is a deficient number, since it is larger than the sum of its proper divisors (6703531501).

13918533939 is a wasteful number, since it uses less digits than its factorization.

13918533939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50387 (or 50381 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 54.

The spelling of 13918533939 in words is "thirteen billion, nine hundred eighteen million, five hundred thirty-three thousand, nine hundred thirty-nine".