18615666132 has 96 divisors (see below), whose sum is σ = 55777478400. Its totient is φ = 5258981376.

The previous prime is 18615666127. The next prime is 18615666133. The reversal of 18615666132 is 23166651681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18615666133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71053 + ... + 205620.

It is an arithmetic number, because the mean of its divisors is an integer number (581015400).

Almost surely, 2^18615666132 is an apocalyptic number.

18615666132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18615666132 is an abundant number, since it is smaller than the sum of its proper divisors (37161812268).

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

18615666132 is a wasteful number, since it uses less digits than its factorization.

18615666132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276782 (or 276774 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 18615666132 in words is "eighteen billion, six hundred fifteen million, six hundred sixty-six thousand, one hundred thirty-two".