21112518167 has 6 divisors (see below), whose sum is σ = 22861484352. Its totient is φ = 19488478152.

The previous prime is 21112518157. The next prime is 21112518221. The reversal of 21112518167 is 76181521112.

It is not a de Polignac number, because 21112518167 - 2¹⁸ = 21112256023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112518107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62462903 + ... + 62463240.

It is an arithmetic number, because the mean of its divisors is an integer number (3810247392).

Almost surely, 2^21112518167 is an apocalyptic number.

21112518167 is a deficient number, since it is larger than the sum of its proper divisors (1748966185).

21112518167 is a wasteful number, since it uses less digits than its factorization.

21112518167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124926169 (or 124926156 counting only the distinct ones).

The product of its digits is 6720, while the sum is 35.

The spelling of 21112518167 in words is "twenty-one billion, one hundred twelve million, five hundred eighteen thousand, one hundred sixty-seven".