21163292 has 12 divisors (see below), whose sum is σ = 37068696. Its totient is φ = 10572240.

The previous prime is 21163291. The next prime is 21163309. The reversal of 21163292 is 29236112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21163291) 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, 6023 + ... + 8865.

It is an arithmetic number, because the mean of its divisors is an integer number (3089058).

Almost surely, 2^21163292 is an apocalyptic number.

It is an amenable number.

21163292 is a deficient number, since it is larger than the sum of its proper divisors (15905404).

21163292 is a wasteful number, since it uses less digits than its factorization.

21163292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708 (or 4706 counting only the distinct ones).

The product of its digits is 1296, while the sum is 26.

The square root of 21163292 is about 4600.3578121707. The cubic root of 21163292 is about 276.6056677508.

The spelling of 21163292 in words is "twenty-one million, one hundred sixty-three thousand, two hundred ninety-two".