18015941064 has 32 divisors (see below), whose sum is σ = 49134385440. Its totient is φ = 5459376000.

The previous prime is 18015941023. The next prime is 18015941071. The reversal of 18015941064 is 46014951081.

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, 34120837 + ... + 34121364.

It is an arithmetic number, because the mean of its divisors is an integer number (1535449545).

Almost surely, 2^18015941064 is an apocalyptic number.

It is an amenable number.

18015941064 is an abundant number, since it is smaller than the sum of its proper divisors (31118444376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18015941064 is a wasteful number, since it uses less digits than its factorization.

18015941064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68242221 (or 68242217 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 18015941064 in words is "eighteen billion, fifteen million, nine hundred forty-one thousand, sixty-four".