18655996023 has 24 divisors (see below), whose sum is σ = 31003908000. Its totient is φ = 10589016384.

The previous prime is 18655996019. The next prime is 18655996031. The reversal of 18655996023 is 32069955681.

It is a happy number.

18655996023 is a `hidden beast` number, since 1 + 8 + 6 + 559 + 9 + 60 + 23 = 666.

It is not a de Polignac number, because 18655996023 - 2² = 18655996019 is a prime.

It is a super-2 number, since 2×18655996023² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18655996123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 984328 + ... + 1003101.

It is an arithmetic number, because the mean of its divisors is an integer number (1291829500).

Almost surely, 2^18655996023 is an apocalyptic number.

18655996023 is a deficient number, since it is larger than the sum of its proper divisors (12347911977).

18655996023 is a wasteful number, since it uses less digits than its factorization.

18655996023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987591 (or 1987588 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 54.

The spelling of 18655996023 in words is "eighteen billion, six hundred fifty-five million, nine hundred ninety-six thousand, twenty-three".