21823948 has 12 divisors (see below), whose sum is σ = 38345832. Its totient is φ = 10868000.

The previous prime is 21823897. The next prime is 21823981. The reversal of 21823948 is 84932812.

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, 9865 + ... + 11872.

It is an arithmetic number, because the mean of its divisors is an integer number (3195486).

Almost surely, 2^21823948 is an apocalyptic number.

It is an amenable number.

21823948 is a deficient number, since it is larger than the sum of its proper divisors (16521884).

21823948 is a wasteful number, since it uses less digits than its factorization.

21823948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21992 (or 21990 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 21823948 is about 4671.6108570813. The cubic root of 21823948 is about 279.4544991605.

The spelling of 21823948 in words is "twenty-one million, eight hundred twenty-three thousand, nine hundred forty-eight".