18039057784 has 32 divisors (see below), whose sum is σ = 37009607040. Its totient is φ = 8174786400.

The previous prime is 18039057781. The next prime is 18039057791. The reversal of 18039057784 is 48775093081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18039057781) 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 7 ways as a sum of consecutive naturals, for example, 280524 + ... + 338779.

It is an arithmetic number, because the mean of its divisors is an integer number (1156550220).

Almost surely, 2^18039057784 is an apocalyptic number.

It is an amenable number.

18039057784 is an abundant number, since it is smaller than the sum of its proper divisors (18970549256).

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

18039057784 is a wasteful number, since it uses less digits than its factorization.

18039057784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619651 (or 619647 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 18039057784 in words is "eighteen billion, thirty-nine million, fifty-seven thousand, seven hundred eighty-four".