17940927815 has 12 divisors (see below), whose sum is σ = 22870028856. Its totient is φ = 13508462208.

The previous prime is 17940927773. The next prime is 17940927841. The reversal of 17940927815 is 51872904971.

It is not a de Polignac number, because 17940927815 - 2¹² = 17940923719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6206489 + ... + 6209378.

It is an arithmetic number, because the mean of its divisors is an integer number (1905835738).

Almost surely, 2^17940927815 is an apocalyptic number.

17940927815 is a deficient number, since it is larger than the sum of its proper divisors (4929101041).

17940927815 is a wasteful number, since it uses less digits than its factorization.

17940927815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12415906 (or 12415889 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 53.

The spelling of 17940927815 in words is "seventeen billion, nine hundred forty million, nine hundred twenty-seven thousand, eight hundred fifteen".