21296412 has 48 divisors (see below), whose sum is σ = 55483680. Its totient is φ = 7064064.

The previous prime is 21296399. The next prime is 21296417. The reversal of 21296412 is 21469212.

21296412 is a `hidden beast` number, since 2 + 12 + 9 + 641 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 (21296417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31308 + ... + 31980.

It is an arithmetic number, because the mean of its divisors is an integer number (1155910).

Almost surely, 2^21296412 is an apocalyptic number.

It is an amenable number.

21296412 is an abundant number, since it is smaller than the sum of its proper divisors (34187268).

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

21296412 is a wasteful number, since it uses less digits than its factorization.

21296412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 971 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 21296412 is about 4614.8035711176. The cubic root of 21296412 is about 277.1844184566.

The spelling of 21296412 in words is "twenty-one million, two hundred ninety-six thousand, four hundred twelve".