21964292 has 24 divisors (see below), whose sum is σ = 44386944. Its totient is φ = 9315072.

The previous prime is 21964277. The next prime is 21964297. The reversal of 21964292 is 29246912.

It is a super-2 number, since 2×21964292² = 964860246122528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21964297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1328 + ... + 6759.

It is an arithmetic number, because the mean of its divisors is an integer number (1849456).

Almost surely, 2^21964292 is an apocalyptic number.

It is an amenable number.

21964292 is an abundant number, since it is smaller than the sum of its proper divisors (22422652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21964292 is a wasteful number, since it uses less digits than its factorization.

21964292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8195 (or 8193 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 21964292 is about 4686.6077284108. The cubic root of 21964292 is about 280.0522521531.

The spelling of 21964292 in words is "twenty-one million, nine hundred sixty-four thousand, two hundred ninety-two".