18700055 has 16 divisors (see below), whose sum is σ = 25052544. Its totient is φ = 13282080.

The previous prime is 18700039. The next prime is 18700061. The reversal of 18700055 is 55000781.

It is not a de Polignac number, because 18700055 - 2⁴ = 18700039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18699997 and 18700033.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1589 + ... + 6318.

It is an arithmetic number, because the mean of its divisors is an integer number (1565784).

Almost surely, 2^18700055 is an apocalyptic number.

18700055 is a deficient number, since it is larger than the sum of its proper divisors (6352489).

18700055 is a wasteful number, since it uses less digits than its factorization.

18700055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7966.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 18700055 is about 4324.3560214210. The cubic root of 18700055 is about 265.4285459511.

The spelling of 18700055 in words is "eighteen million, seven hundred thousand, fifty-five".