21466432 has 28 divisors (see below), whose sum is σ = 45875956. Its totient is φ = 9907200.

The previous prime is 21466421. The next prime is 21466441. The reversal of 21466432 is 23466412.

It can be written as a sum of positive squares in 2 ways, for example, as 6843456 + 14622976 = 2616^2 + 3824^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21466432.

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, 12069 + ... + 13732.

It is an arithmetic number, because the mean of its divisors is an integer number (1638427).

Almost surely, 2^21466432 is an apocalyptic number.

It is an amenable number.

21466432 is an abundant number, since it is smaller than the sum of its proper divisors (24409524).

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

21466432 is a wasteful number, since it uses less digits than its factorization.

21466432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25826 (or 25816 counting only the distinct ones).

The product of its digits is 6912, while the sum is 28.

The square root of 21466432 is about 4633.1881032395. The cubic root of 21466432 is about 277.9200984941.

The spelling of 21466432 in words is "twenty-one million, four hundred sixty-six thousand, four hundred thirty-two".