21734944 has 48 divisors (see below), whose sum is σ = 53355456. Its totient is φ = 8467200.

The previous prime is 21734941. The next prime is 21734953. The reversal of 21734944 is 44943712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734941) 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, 1947 + ... + 6874.

It is an arithmetic number, because the mean of its divisors is an integer number (1111572).

Almost surely, 2^21734944 is an apocalyptic number.

It is an amenable number.

21734944 is an abundant number, since it is smaller than the sum of its proper divisors (31620512).

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

21734944 is a wasteful number, since it uses less digits than its factorization.

21734944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8849 (or 8841 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 21734944 is about 4662.0750744706. The cubic root of 21734944 is about 279.0740843759.

It can be divided in two parts, 2173 and 4944, that added together give a palindrome (7117).

The spelling of 21734944 in words is "twenty-one million, seven hundred thirty-four thousand, nine hundred forty-four".