21834412 has 12 divisors (see below), whose sum is σ = 38245480. Its totient is φ = 10907136.

The previous prime is 21834391. The next prime is 21834413. The reversal of 21834412 is 21443812.

It is not an unprimeable number, because it can be changed into a prime (21834413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4588 + ... + 8044.

Almost surely, 2^21834412 is an apocalyptic number.

It is an amenable number.

21834412 is a deficient number, since it is larger than the sum of its proper divisors (16411068).

21834412 is a wasteful number, since it uses less digits than its factorization.

21834412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5040 (or 5038 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 21834412 is about 4672.7306791640. The cubic root of 21834412 is about 279.4991556794.

The spelling of 21834412 in words is "twenty-one million, eight hundred thirty-four thousand, four hundred twelve".