21833474 has 32 divisors (see below), whose sum is σ = 38174976. Its totient is φ = 9273600.

The previous prime is 21833447. The next prime is 21833479. The reversal of 21833474 is 47433812.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21833474.

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 15 ways as a sum of consecutive naturals, for example, 20249 + ... + 21299.

It is an arithmetic number, because the mean of its divisors is an integer number (1192968).

Almost surely, 2^21833474 is an apocalyptic number.

21833474 is a deficient number, since it is larger than the sum of its proper divisors (16341502).

21833474 is a wasteful number, since it uses less digits than its factorization.

21833474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130.

The product of its digits is 16128, while the sum is 32.

The square root of 21833474 is about 4672.6303085093. The cubic root of 21833474 is about 279.4951532213.

The spelling of 21833474 in words is "twenty-one million, eight hundred thirty-three thousand, four hundred seventy-four".