21266232 has 32 divisors (see below), whose sum is σ = 57256080. Its totient is φ = 6543360.

The previous prime is 21266213. The next prime is 21266239. The reversal of 21266232 is 23266212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21266239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33769 + ... + 34392.

Almost surely, 2^21266232 is an apocalyptic number.

It is an amenable number.

21266232 is an abundant number, since it is smaller than the sum of its proper divisors (35989848).

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

21266232 is a wasteful number, since it uses less digits than its factorization.

21266232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68183 (or 68179 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 21266232 is about 4611.5325001565. The cubic root of 21266232 is about 277.0534201689.

The spelling of 21266232 in words is "twenty-one million, two hundred sixty-six thousand, two hundred thirty-two".