18672457516 has 6 divisors (see below), whose sum is σ = 32676800660. Its totient is φ = 9336228756.

The previous prime is 18672457451. The next prime is 18672457519. The reversal of 18672457516 is 61575427681.

It is not an unprimeable number, because it can be changed into a prime (18672457519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2334057186 + ... + 2334057193.

Almost surely, 2^18672457516 is an apocalyptic number.

It is an amenable number.

18672457516 is a deficient number, since it is larger than the sum of its proper divisors (14004343144).

18672457516 is a wasteful number, since it uses less digits than its factorization.

18672457516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4668114383 (or 4668114381 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 52.

The spelling of 18672457516 in words is "eighteen billion, six hundred seventy-two million, four hundred fifty-seven thousand, five hundred sixteen".