18618704088 has 32 divisors (see below), whose sum is σ = 47107569600. Its totient is φ = 6131460128.

The previous prime is 18618704081. The next prime is 18618704107. The reversal of 18618704088 is 88040781681.

It is a super-2 number, since 2×18618704088² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18618704088.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618704081) 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, 4671378 + ... + 4675361.

It is an arithmetic number, because the mean of its divisors is an integer number (1472111550).

Almost surely, 2^18618704088 is an apocalyptic number.

It is an amenable number.

18618704088 is an abundant number, since it is smaller than the sum of its proper divisors (28488865512).

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

18618704088 is a wasteful number, since it uses less digits than its factorization.

18618704088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9346831 (or 9346827 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 51.

The spelling of 18618704088 in words is "eighteen billion, six hundred eighteen million, seven hundred four thousand, eighty-eight".