21832464 has 20 divisors (see below), whose sum is σ = 56400656. Its totient is φ = 7277472.

The previous prime is 21832453. The next prime is 21832477. The reversal of 21832464 is 46423812.

It is a super-2 number, since 2×21832464² = 953312968622592, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227374 + ... + 227469.

Almost surely, 2^21832464 is an apocalyptic number.

21832464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21832464 is an abundant number, since it is smaller than the sum of its proper divisors (34568192).

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

21832464 is a wasteful number, since it uses less digits than its factorization.

21832464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454854 (or 454848 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 21832464 is about 4672.5222310868. The cubic root of 21832464 is about 279.4908434100.

The spelling of 21832464 in words is "twenty-one million, eight hundred thirty-two thousand, four hundred sixty-four".