21460432 has 60 divisors (see below), whose sum is σ = 49984896. Its totient is φ = 8890560.

The previous prime is 21460423. The next prime is 21460441. The reversal of 21460432 is 23406412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21460423) and next prime (21460441).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23863 + ... + 24745.

Almost surely, 2^21460432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21460432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24992448).

21460432 is an abundant number, since it is smaller than the sum of its proper divisors (28524464).

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

21460432 is a wasteful number, since it uses less digits than its factorization.

21460432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 21460432 is about 4632.5405556778. The cubic root of 21460432 is about 277.8942026213.

Adding to 21460432 its reverse (23406412), we get a palindrome (44866844).

The spelling of 21460432 in words is "twenty-one million, four hundred sixty thousand, four hundred thirty-two".