21833470 has 16 divisors (see below), whose sum is σ = 41369040. Its totient is φ = 8273664.

The previous prime is 21833447. The next prime is 21833479. The reversal of 21833470 is 7433812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21833479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57267 + ... + 57646.

It is an arithmetic number, because the mean of its divisors is an integer number (2585565).

Almost surely, 2^21833470 is an apocalyptic number.

21833470 is a deficient number, since it is larger than the sum of its proper divisors (19535570).

21833470 is a wasteful number, since it uses less digits than its factorization.

21833470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114939.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21833470 is about 4672.6298804849. The cubic root of 21833470 is about 279.4951361530.

The spelling of 21833470 in words is "twenty-one million, eight hundred thirty-three thousand, four hundred seventy".