22117794981 has 16 divisors (see below), whose sum is σ = 29980022784. Its totient is φ = 14501109744.

The previous prime is 22117794961. The next prime is 22117795013. The reversal of 22117794981 is 18949771122.

It is not a de Polignac number, because 22117794981 - 2²¹ = 22115697829 is a prime.

It is a super-2 number, since 2×22117794981² (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 (22117794961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31366 + ... + 212648.

It is an arithmetic number, because the mean of its divisors is an integer number (1873751424).

Almost surely, 2^22117794981 is an apocalyptic number.

It is an amenable number.

22117794981 is a deficient number, since it is larger than the sum of its proper divisors (7862227803).

22117794981 is a wasteful number, since it uses less digits than its factorization.

22117794981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181960.

The product of its digits is 508032, while the sum is 51.

The spelling of 22117794981 in words is "twenty-two billion, one hundred seventeen million, seven hundred ninety-four thousand, nine hundred eighty-one".