18722427971 has 16 divisors (see below), whose sum is σ = 20415628800. Its totient is φ = 17066720640.

The previous prime is 18722427967. The next prime is 18722428001. The reversal of 18722427971 is 17972422781.

It is a cyclic number.

It is not a de Polignac number, because 18722427971 - 2² = 18722427967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18722427071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307166 + ... + 363036.

It is an arithmetic number, because the mean of its divisors is an integer number (1275976800).

Almost surely, 2^18722427971 is an apocalyptic number.

18722427971 is a deficient number, since it is larger than the sum of its proper divisors (1693200829).

18722427971 is a wasteful number, since it uses less digits than its factorization.

18722427971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56206.

The product of its digits is 790272, while the sum is 50.

The spelling of 18722427971 in words is "eighteen billion, seven hundred twenty-two million, four hundred twenty-seven thousand, nine hundred seventy-one".