21458322 has 48 divisors (see below), whose sum is σ = 48117888. Its totient is φ = 6907680.

The previous prime is 21458321. The next prime is 21458329. The reversal of 21458322 is 22385412.

It is not an unprimeable number, because it can be changed into a prime (21458321) 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, 79047 + ... + 79317.

It is an arithmetic number, because the mean of its divisors is an integer number (1002456).

Almost surely, 2^21458322 is an apocalyptic number.

21458322 is an abundant number, since it is smaller than the sum of its proper divisors (26659566).

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

21458322 is a wasteful number, since it uses less digits than its factorization.

21458322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 412 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 21458322 is about 4632.3128132716. The cubic root of 21458322 is about 277.8850947589.

The spelling of 21458322 in words is "twenty-one million, four hundred fifty-eight thousand, three hundred twenty-two".