21463488 has 56 divisors (see below), whose sum is σ = 63103760. Its totient is φ = 7153920.

The previous prime is 21463447. The next prime is 21463489. The reversal of 21463488 is 88436412.

21463488 is a `hidden beast` number, since 2 + 14 + 634 + 8 + 8 = 666.

It is a super-2 number, since 2×21463488² = 921362634252288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 (21463489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4483 + ... + 7938.

Almost surely, 2^21463488 is an apocalyptic number.

It is an amenable number.

21463488 is an abundant number, since it is smaller than the sum of its proper divisors (41640272).

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

21463488 is a wasteful number, since it uses less digits than its factorization.

21463488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12442 (or 12426 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 21463488 is about 4632.8703845456. The cubic root of 21463488 is about 277.9073928555.

The spelling of 21463488 in words is "twenty-one million, four hundred sixty-three thousand, four hundred eighty-eight".