21948232 has 16 divisors (see below), whose sum is σ = 42110640. Its totient is φ = 10718736.

The previous prime is 21948229. The next prime is 21948263. The reversal of 21948232 is 23284912.

It is a junction number, because it is equal to n+sod(n) for n = 21948194 and 21948203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31558 + ... + 32245.

It is an arithmetic number, because the mean of its divisors is an integer number (2631915).

Almost surely, 2^21948232 is an apocalyptic number.

It is an amenable number.

21948232 is a deficient number, since it is larger than the sum of its proper divisors (20162408).

21948232 is a wasteful number, since it uses less digits than its factorization.

21948232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63852 (or 63848 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 21948232 is about 4684.8940222805. The cubic root of 21948232 is about 279.9839786751.

The spelling of 21948232 in words is "twenty-one million, nine hundred forty-eight thousand, two hundred thirty-two".