21434568 has 16 divisors (see below), whose sum is σ = 53586480. Its totient is φ = 7144848.

The previous prime is 21434531. The next prime is 21434579. The reversal of 21434568 is 86543412.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446530 + ... + 446577.

It is an arithmetic number, because the mean of its divisors is an integer number (3349155).

Almost surely, 2^21434568 is an apocalyptic number.

It is an amenable number.

21434568 is an abundant number, since it is smaller than the sum of its proper divisors (32151912).

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

21434568 is a wasteful number, since it uses less digits than its factorization.

21434568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893116 (or 893112 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 21434568 is about 4629.7481572975. The cubic root of 21434568 is about 277.7825188643.

The spelling of 21434568 in words is "twenty-one million, four hundred thirty-four thousand, five hundred sixty-eight".