13918039538 has 8 divisors (see below), whose sum is σ = 22482986988. Its totient is φ = 6423710544.

The previous prime is 13918039529. The next prime is 13918039561. The reversal of 13918039538 is 83593081931.

It can be written as a sum of positive squares in 2 ways, for example, as 12493203529 + 1424836009 = 111773^2 + 37747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267654581 + ... + 267654632.

Almost surely, 2^13918039538 is an apocalyptic number.

13918039538 is a deficient number, since it is larger than the sum of its proper divisors (8564947450).

13918039538 is a wasteful number, since it uses less digits than its factorization.

13918039538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535309228.

The product of its (nonzero) digits is 699840, while the sum is 50.

The spelling of 13918039538 in words is "thirteen billion, nine hundred eighteen million, thirty-nine thousand, five hundred thirty-eight".