20115323018 has 16 divisors (see below), whose sum is σ = 34919911680. Its totient is φ = 8511727536.

The previous prime is 20115323017. The next prime is 20115323051. The reversal of 20115323018 is 81032351102.

It is not an unprimeable number, because it can be changed into a prime (20115323017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9092621 + ... + 9094832.

It is an arithmetic number, because the mean of its divisors is an integer number (2182494480).

Almost surely, 2^20115323018 is an apocalyptic number.

20115323018 is a deficient number, since it is larger than the sum of its proper divisors (14804588662).

20115323018 is a wasteful number, since it uses less digits than its factorization.

20115323018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18187541.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 20115323018 in words is "twenty billion, one hundred fifteen million, three hundred twenty-three thousand, eighteen".