18734076636 has 48 divisors (see below), whose sum is σ = 50491848960. Its totient is φ = 5343051520.

The previous prime is 18734076631. The next prime is 18734076637. The reversal of 18734076636 is 63667043781.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18734076631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4172016 + ... + 4176503.

It is an arithmetic number, because the mean of its divisors is an integer number (1051913520).

Almost surely, 2^18734076636 is an apocalyptic number.

It is an amenable number.

18734076636 is an abundant number, since it is smaller than the sum of its proper divisors (31757772324).

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

18734076636 is a wasteful number, since it uses less digits than its factorization.

18734076636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348554 (or 8348552 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 51.

The spelling of 18734076636 in words is "eighteen billion, seven hundred thirty-four million, seventy-six thousand, six hundred thirty-six".