21464136 has 32 divisors (see below), whose sum is σ = 59623200. Its totient is φ = 7154640.

The previous prime is 21464123. The next prime is 21464153. The reversal of 21464136 is 63146412.

21464136 is a `hidden beast` number, since 2 + 14 + 641 + 3 + 6 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49470 + ... + 49901.

It is an arithmetic number, because the mean of its divisors is an integer number (1863225).

Almost surely, 2^21464136 is an apocalyptic number.

It is an amenable number.

21464136 is an abundant number, since it is smaller than the sum of its proper divisors (38159064).

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

21464136 is a wasteful number, since it uses less digits than its factorization.

21464136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99386 (or 99376 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 21464136 is about 4632.9403190630. The cubic root of 21464136 is about 277.9101895768.

The spelling of 21464136 in words is "twenty-one million, four hundred sixty-four thousand, one hundred thirty-six".