21910232 has 8 divisors (see below), whose sum is σ = 41081700. Its totient is φ = 10955112.

The previous prime is 21910223. The next prime is 21910241. The reversal of 21910232 is 23201912.

It is an interprime number because it is at equal distance from previous prime (21910223) and next prime (21910241).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1369382 + ... + 1369397.

Almost surely, 2^21910232 is an apocalyptic number.

It is an amenable number.

21910232 is a deficient number, since it is larger than the sum of its proper divisors (19171468).

21910232 is a wasteful number, since it uses less digits than its factorization.

21910232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738785 (or 2738781 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 21910232 is about 4680.8366773473. The cubic root of 21910232 is about 279.8223022166.

The spelling of 21910232 in words is "twenty-one million, nine hundred ten thousand, two hundred thirty-two".