21232308 has 24 divisors (see below), whose sum is σ = 49732480. Its totient is φ = 7050240.

The previous prime is 21232307. The next prime is 21232363. The reversal of 21232308 is 80323212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232307) 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, 13 + ... + 6516.

Almost surely, 2^21232308 is an apocalyptic number.

It is an amenable number.

21232308 is an abundant number, since it is smaller than the sum of its proper divisors (28500172).

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

21232308 is a wasteful number, since it uses less digits than its factorization.

21232308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6807 (or 6805 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 21232308 is about 4607.8528622342. The cubic root of 21232308 is about 276.9060227627.

The spelling of 21232308 in words is "twenty-one million, two hundred thirty-two thousand, three hundred eight".