18365234973 has 8 divisors (see below), whose sum is σ = 24502111200. Its totient is φ = 12235924368.

The previous prime is 18365234911. The next prime is 18365234977. The reversal of 18365234973 is 37943256381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18365234973 - 2⁸ = 18365234717 is a prime.

It is a super-2 number, since 2×18365234973² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18365234977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885738 + ... + 1895451.

It is an arithmetic number, because the mean of its divisors is an integer number (3062763900).

Almost surely, 2^18365234973 is an apocalyptic number.

It is an amenable number.

18365234973 is a deficient number, since it is larger than the sum of its proper divisors (6136876227).

18365234973 is a wasteful number, since it uses less digits than its factorization.

18365234973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3782811.

The product of its digits is 3265920, while the sum is 51.

The spelling of 18365234973 in words is "eighteen billion, three hundred sixty-five million, two hundred thirty-four thousand, nine hundred seventy-three".