18745881320536 has 32 divisors (see below), whose sum is σ = 37216699665840. Its totient is φ = 8821446202368.

The previous prime is 18745881320527. The next prime is 18745881320567. The reversal of 18745881320536 is 63502318854781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7406980 + ... + 9610156.

Almost surely, 2^{18745881320536} is an apocalyptic number.

It is an amenable number.

18745881320536 is a deficient number, since it is larger than the sum of its proper divisors (18470818345304).

18745881320536 is a wasteful number, since it uses less digits than its factorization.

18745881320536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265763 (or 2265759 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 61.

The spelling of 18745881320536 in words is "eighteen trillion, seven hundred forty-five billion, eight hundred eighty-one million, three hundred twenty thousand, five hundred thirty-six".