21734432 has 24 divisors (see below), whose sum is σ = 45307836. Its totient is φ = 10227712.

The previous prime is 21734431. The next prime is 21734437. The reversal of 21734432 is 23443712.

It can be written as a sum of positive squares in 2 ways, for example, as 20106256 + 1628176 = 4484^2 + 1276^2 .

It is not an unprimeable number, because it can be changed into a prime (21734431) 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, 19433 + ... + 20520.

Almost surely, 2^21734432 is an apocalyptic number.

It is an amenable number.

21734432 is an abundant number, since it is smaller than the sum of its proper divisors (23573404).

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

21734432 is a wasteful number, since it uses less digits than its factorization.

21734432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39980 (or 39972 counting only the distinct ones).

The product of its digits is 4032, while the sum is 26.

The square root of 21734432 is about 4662.0201629766. The cubic root of 21734432 is about 279.0718930191.

The spelling of 21734432 in words is "twenty-one million, seven hundred thirty-four thousand, four hundred thirty-two".