21962224 has 20 divisors (see below), whose sum is σ = 43590960. Its totient is φ = 10712960.

The previous prime is 21962209. The next prime is 21962261. The reversal of 21962224 is 42226912.

It is a junction number, because it is equal to n+sod(n) for n = 21962192 and 21962201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16084 + ... + 17395.

It is an arithmetic number, because the mean of its divisors is an integer number (2179548).

Almost surely, 2^21962224 is an apocalyptic number.

It is an amenable number.

21962224 is a deficient number, since it is larger than the sum of its proper divisors (21628736).

21962224 is a wasteful number, since it uses less digits than its factorization.

21962224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33528 (or 33522 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 21962224 is about 4686.3870945538. The cubic root of 21962224 is about 280.0434626410.

The spelling of 21962224 in words is "twenty-one million, nine hundred sixty-two thousand, two hundred twenty-four".