22890660921 has 12 divisors (see below), whose sum is σ = 34501866048. Its totient is φ = 14596943064.

The previous prime is 22890660899. The next prime is 22890660929. The reversal of 22890660921 is 12906609822.

It is not a de Polignac number, because 22890660921 - 2¹⁸ = 22890398777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22890660929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55291245 + ... + 55291658.

It is an arithmetic number, because the mean of its divisors is an integer number (2875155504).

Almost surely, 2^22890660921 is an apocalyptic number.

It is an amenable number.

22890660921 is a deficient number, since it is larger than the sum of its proper divisors (11611205127).

22890660921 is a wasteful number, since it uses less digits than its factorization.

22890660921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110582932 (or 110582929 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 22890660921 in words is "twenty-two billion, eight hundred ninety million, six hundred sixty thousand, nine hundred twenty-one".