18543700344 has 32 divisors (see below), whose sum is σ = 49925347920. Its totient is φ = 5705753856.

The previous prime is 18543700339. The next prime is 18543700411. The reversal of 18543700344 is 44300734581.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 29717157 + ... + 29717780.

Almost surely, 2^18543700344 is an apocalyptic number.

It is an amenable number.

18543700344 is an abundant number, since it is smaller than the sum of its proper divisors (31381647576).

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

18543700344 is a wasteful number, since it uses less digits than its factorization.

18543700344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59434959 (or 59434955 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 18543700344 in words is "eighteen billion, five hundred forty-three million, seven hundred thousand, three hundred forty-four".