21933234 has 16 divisors (see below), whose sum is σ = 48740640. Its totient is φ = 7311060.

The previous prime is 21933229. The next prime is 21933253. The reversal of 21933234 is 43233912.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21933198 and 21933207.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 203032 + ... + 203139.

It is an arithmetic number, because the mean of its divisors is an integer number (3046290).

Almost surely, 2^21933234 is an apocalyptic number.

21933234 is an abundant number, since it is smaller than the sum of its proper divisors (26807406).

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

21933234 is a wasteful number, since it uses less digits than its factorization.

21933234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406182 (or 406176 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 21933234 is about 4683.2930721876. The cubic root of 21933234 is about 279.9201898384.

The spelling of 21933234 in words is "twenty-one million, nine hundred thirty-three thousand, two hundred thirty-four".