21472632 has 96 divisors (see below), whose sum is σ = 62927280. Its totient is φ = 6589440.

The previous prime is 21472631. The next prime is 21472657. The reversal of 21472632 is 23627412.

21472632 is a `hidden beast` number, since 21 + 4 + 7 + 2 + 632 = 666.

It is a super-2 number, since 2×21472632² = 922147850014848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21472596 and 21472605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472631) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 64707 + ... + 65037.

Almost surely, 2^21472632 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 21472632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31463640).

21472632 is an abundant number, since it is smaller than the sum of its proper divisors (41454648).

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

21472632 is a wasteful number, since it uses less digits than its factorization.

21472632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 406 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 21472632 is about 4633.8571406551. The cubic root of 21472632 is about 277.9468524938.

The spelling of 21472632 in words is "twenty-one million, four hundred seventy-two thousand, six hundred thirty-two".