21832434 has 36 divisors (see below), whose sum is σ = 51229386. Its totient is φ = 6716736.

The previous prime is 21832417. The next prime is 21832441. The reversal of 21832434 is 43423812.

It can be written as a sum of positive squares in 3 ways, for example, as 16426809 + 5405625 = 4053^2 + 2325^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21832398 and 21832407.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 547 + ... + 6630.

Almost surely, 2^21832434 is an apocalyptic number.

21832434 is an abundant number, since it is smaller than the sum of its proper divisors (29396952).

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

21832434 is a wasteful number, since it uses less digits than its factorization.

21832434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7211 (or 7195 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 21832434 is about 4672.5190208281. The cubic root of 21832434 is about 279.4907153938.

The spelling of 21832434 in words is "twenty-one million, eight hundred thirty-two thousand, four hundred thirty-four".