21792234 has 16 divisors (see below), whose sum is σ = 43637472. Its totient is φ = 7255248.

The previous prime is 21792233. The next prime is 21792241. The reversal of 21792234 is 43229712.

It is not an unprimeable number, because it can be changed into a prime (21792233) 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, 4897 + ... + 8219.

It is an arithmetic number, because the mean of its divisors is an integer number (2727342).

Almost surely, 2^21792234 is an apocalyptic number.

21792234 is an abundant number, since it is smaller than the sum of its proper divisors (21845238).

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

21792234 is a wasteful number, since it uses less digits than its factorization.

21792234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4421.

The product of its digits is 6048, while the sum is 30.

The square root of 21792234 is about 4668.2152906652. The cubic root of 21792234 is about 279.3190681738.

The spelling of 21792234 in words is "twenty-one million, seven hundred ninety-two thousand, two hundred thirty-four".