18697250055 has 32 divisors (see below), whose sum is σ = 32729349888. Its totient is φ = 9039180800.

The previous prime is 18697250053. The next prime is 18697250101. The reversal of 18697250055 is 55005279681.

It is a happy number.

It is not a de Polignac number, because 18697250055 - 2¹ = 18697250053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18697249986 and 18697250013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18697250051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106026 + ... + 220535.

It is an arithmetic number, because the mean of its divisors is an integer number (1022792184).

Almost surely, 2^18697250055 is an apocalyptic number.

18697250055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18697250055 is a deficient number, since it is larger than the sum of its proper divisors (14032099833).

18697250055 is a wasteful number, since it uses less digits than its factorization.

18697250055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326927.

The product of its (nonzero) digits is 756000, while the sum is 48.

The spelling of 18697250055 in words is "eighteen billion, six hundred ninety-seven million, two hundred fifty thousand, fifty-five".