20015936018 has 16 divisors (see below), whose sum is σ = 32435446680. Its totient is φ = 9208978176.

The previous prime is 20015935997. The next prime is 20015936029. The reversal of 20015936018 is 81063951002.

It can be written as a sum of positive squares in 4 ways, for example, as 6043041169 + 13972894849 = 77737^2 + 118207^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1206023 + ... + 1222506.

Almost surely, 2^20015936018 is an apocalyptic number.

20015936018 is a deficient number, since it is larger than the sum of its proper divisors (12419510662).

20015936018 is a wasteful number, since it uses less digits than its factorization.

20015936018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2428861.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 20015936018 in words is "twenty billion, fifteen million, nine hundred thirty-six thousand, eighteen".