18768272136 has 64 divisors (see below), whose sum is σ = 51840777600. Its totient is φ = 5632078848.

The previous prime is 18768272093. The next prime is 18768272137. The reversal of 18768272136 is 63127286781.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (18768272137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990631 + ... + 1009398.

It is an arithmetic number, because the mean of its divisors is an integer number (810012150).

Almost surely, 2^18768272136 is an apocalyptic number.

It is an amenable number.

18768272136 is an abundant number, since it is smaller than the sum of its proper divisors (33072505464).

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

18768272136 is a wasteful number, since it uses less digits than its factorization.

18768272136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000078 (or 2000074 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The spelling of 18768272136 in words is "eighteen billion, seven hundred sixty-eight million, two hundred seventy-two thousand, one hundred thirty-six".