18388855053 has 6 divisors (see below), whose sum is σ = 26561679534. Its totient is φ = 12259236696.

The previous prime is 18388855049. The next prime is 18388855057. The reversal of 18388855053 is 35055888381.

18388855053 is a `hidden beast` number, since 1 + 8 + 3 + 8 + 88 + 550 + 5 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (18388855049) and next prime (18388855057).

It can be written as a sum of positive squares in only one way, i.e., 17895215529 + 493639524 = 133773^2 + 22218^2 .

It is not a de Polignac number, because 18388855053 - 2² = 18388855049 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18388855057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1021603050 + ... + 1021603067.

It is an arithmetic number, because the mean of its divisors is an integer number (4426946589).

Almost surely, 2^18388855053 is an apocalyptic number.

It is an amenable number.

18388855053 is a deficient number, since it is larger than the sum of its proper divisors (8172824481).

18388855053 is a wasteful number, since it uses less digits than its factorization.

18388855053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043206123 (or 2043206120 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 54.

The spelling of 18388855053 in words is "eighteen billion, three hundred eighty-eight million, eight hundred fifty-five thousand, fifty-three".