21958696 has 16 divisors (see below), whose sum is σ = 43594740. Its totient is φ = 10333440.

The previous prime is 21958693. The next prime is 21958709. The reversal of 21958696 is 69685912.

It can be written as a sum of positive squares in 2 ways, for example, as 21958596 + 100 = 4686^2 + 10^2 .

It is not an unprimeable number, because it can be changed into a prime (21958691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80595 + ... + 80866.

Almost surely, 2^21958696 is an apocalyptic number.

It is an amenable number.

21958696 is a deficient number, since it is larger than the sum of its proper divisors (21636044).

21958696 is a wasteful number, since it uses less digits than its factorization.

21958696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161484 (or 161480 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 21958696 is about 4686.0106700689. The cubic root of 21958696 is about 280.0284664936.

The spelling of 21958696 in words is "twenty-one million, nine hundred fifty-eight thousand, six hundred ninety-six".