21966292 has 12 divisors (see below), whose sum is σ = 39335296. Its totient is φ = 10727640.

The previous prime is 21966289. The next prime is 21966293. The reversal of 21966292 is 29266912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21966293) 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, 63684 + ... + 64027.

Almost surely, 2^21966292 is an apocalyptic number.

It is an amenable number.

21966292 is a deficient number, since it is larger than the sum of its proper divisors (17369004).

21966292 is a wasteful number, since it uses less digits than its factorization.

21966292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127758 (or 127756 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 21966292 is about 4686.8210975031. The cubic root of 21966292 is about 280.0607521237.

The spelling of 21966292 in words is "twenty-one million, nine hundred sixty-six thousand, two hundred ninety-two".