22691972 has 6 divisors (see below), whose sum is σ = 39710958. Its totient is φ = 11345984.

The previous prime is 22691959. The next prime is 22691993. The reversal of 22691972 is 27919622.

It can be written as a sum of positive squares in only one way, i.e., 21659716 + 1032256 = 4654^2 + 1016^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2836493 + ... + 2836500.

It is an arithmetic number, because the mean of its divisors is an integer number (6618493).

Almost surely, 2^22691972 is an apocalyptic number.

It is an amenable number.

22691972 is a deficient number, since it is larger than the sum of its proper divisors (17018986).

22691972 is a wasteful number, since it uses less digits than its factorization.

22691972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672997 (or 5672995 counting only the distinct ones).

The product of its digits is 27216, while the sum is 38.

The square root of 22691972 is about 4763.6091359388. The cubic root of 22691972 is about 283.1114362592. Note that the first 3 decimals are identical.

The spelling of 22691972 in words is "twenty-two million, six hundred ninety-one thousand, nine hundred seventy-two".