21464352 has 270 divisors, whose sum is σ = 79515513. Its totient is φ = 5660928.

The previous prime is 21464347. The next prime is 21464371. The reversal of 21464352 is 25346412.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

21464352 is a `hidden beast` number, since 2 + 14 + 643 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18352656 + 3111696 = 4284^2 + 1764^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3276.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1651098 + ... + 1651110.

Almost surely, 2^21464352 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 21464352

21464352 is an abundant number, since it is smaller than the sum of its proper divisors (58051161).

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

21464352 is a wasteful number, since it uses less digits than its factorization.

21464352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 25 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 21464352 is about 4632.9636303343. The cubic root of 21464352 is about 277.9111218047.

The spelling of 21464352 in words is "twenty-one million, four hundred sixty-four thousand, three hundred fifty-two".