18217260512 has 36 divisors (see below), whose sum is σ = 39422122488. Its totient is φ = 8280571200.

The previous prime is 18217260499. The next prime is 18217260517. The reversal of 18217260512 is 21506271281.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18217260517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2348564 + ... + 2356307.

It is an arithmetic number, because the mean of its divisors is an integer number (1095058958).

Almost surely, 2^18217260512 is an apocalyptic number.

It is an amenable number.

18217260512 is an abundant number, since it is smaller than the sum of its proper divisors (21204861976).

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

18217260512 is a wasteful number, since it uses less digits than its factorization.

18217260512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704903 (or 4704884 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 18217260512 in words is "eighteen billion, two hundred seventeen million, two hundred sixty thousand, five hundred twelve".