21832712 has 16 divisors (see below), whose sum is σ = 44658000. Its totient is φ = 9923920.

The previous prime is 21832703. The next prime is 21832751. The reversal of 21832712 is 21723812.

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, 123962 + ... + 124137.

It is an arithmetic number, because the mean of its divisors is an integer number (2791125).

Almost surely, 2^21832712 is an apocalyptic number.

21832712 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21832712 is an abundant number, since it is smaller than the sum of its proper divisors (22825288).

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

21832712 is a wasteful number, since it uses less digits than its factorization.

21832712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248116 (or 248112 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 21832712 is about 4672.5487691409. The cubic root of 21832712 is about 279.4919016730.

Subtracting from 21832712 its reverse (21723812), we obtain a square (108900 = 330²).

The spelling of 21832712 in words is "twenty-one million, eight hundred thirty-two thousand, seven hundred twelve".