18846331971 has 32 divisors (see below), whose sum is σ = 28321747200. Its totient is φ = 11076848640.

The previous prime is 18846331949. The next prime is 18846332023. The reversal of 18846331971 is 17913364881.

It is a happy number.

It is not a de Polignac number, because 18846331971 - 2⁹ = 18846331459 is a prime.

It is a super-2 number, since 2×18846331971² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (18846331271) 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, 23025 + ... + 195506.

It is an arithmetic number, because the mean of its divisors is an integer number (885054600).

Almost surely, 2^18846331971 is an apocalyptic number.

18846331971 is a deficient number, since it is larger than the sum of its proper divisors (9475415229).

18846331971 is a wasteful number, since it uses less digits than its factorization.

18846331971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218659.

The product of its digits is 870912, while the sum is 51.

The spelling of 18846331971 in words is "eighteen billion, eight hundred forty-six million, three hundred thirty-one thousand, nine hundred seventy-one".