21484372 has 24 divisors (see below), whose sum is σ = 46274816. Its totient is φ = 8499168.

The previous prime is 21484363. The next prime is 21484399. The reversal of 21484372 is 27348412.

It is a plaindrome in base 11.

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 7 ways as a sum of consecutive naturals, for example, 29148 + ... + 29875.

Almost surely, 2^21484372 is an apocalyptic number.

It is an amenable number.

21484372 is an abundant number, since it is smaller than the sum of its proper divisors (24790444).

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

21484372 is a wasteful number, since it uses less digits than its factorization.

21484372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59047 (or 59045 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 21484372 is about 4635.1237308188. The cubic root of 21484372 is about 277.9974983816.

The spelling of 21484372 in words is "twenty-one million, four hundred eighty-four thousand, three hundred seventy-two".