21926236 has 12 divisors (see below), whose sum is σ = 38483928. Its totient is φ = 10930832.

The previous prime is 21926161. The next prime is 21926293. The reversal of 21926236 is 63262912.

It is a junction number, because it is equal to n+sod(n) for n = 21926198 and 21926207.

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, 6511 + ... + 9286.

It is an arithmetic number, because the mean of its divisors is an integer number (3206994).

Almost surely, 2^21926236 is an apocalyptic number.

It is an amenable number.

21926236 is a deficient number, since it is larger than the sum of its proper divisors (16557692).

21926236 is a wasteful number, since it uses less digits than its factorization.

21926236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16148 (or 16146 counting only the distinct ones).

The product of its digits is 7776, while the sum is 31.

The square root of 21926236 is about 4682.5458887234. The cubic root of 21926236 is about 279.8904163015.

The spelling of 21926236 in words is "twenty-one million, nine hundred twenty-six thousand, two hundred thirty-six".