18901053844 has 6 divisors (see below), whose sum is σ = 33076844234. Its totient is φ = 9450526920.

The previous prime is 18901053817. The next prime is 18901053869. The reversal of 18901053844 is 44835010981.

It can be written as a sum of positive squares in only one way, i.e., 17905651344 + 995402500 = 133812^2 + 31550^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18901053844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2362631727 + ... + 2362631734.

Almost surely, 2^18901053844 is an apocalyptic number.

It is an amenable number.

18901053844 is a deficient number, since it is larger than the sum of its proper divisors (14175790390).

18901053844 is a wasteful number, since it uses less digits than its factorization.

18901053844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4725263465 (or 4725263463 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 18901053844 in words is "eighteen billion, nine hundred one million, fifty-three thousand, eight hundred forty-four".