21893152 has 24 divisors (see below), whose sum is σ = 43206912. Its totient is φ = 10920000.

The previous prime is 21893147. The next prime is 21893153. The reversal of 21893152 is 25139812.

It is not an unprimeable number, because it can be changed into a prime (21893153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23577 + ... + 24487.

It is an arithmetic number, because the mean of its divisors is an integer number (1800288).

Almost surely, 2^21893152 is an apocalyptic number.

It is an amenable number.

21893152 is a deficient number, since it is larger than the sum of its proper divisors (21313760).

21893152 is an equidigital number, since it uses as much as digits as its factorization.

21893152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1664 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 21893152 is about 4679.0118614938. The cubic root of 21893152 is about 279.7495720059.

The spelling of 21893152 in words is "twenty-one million, eight hundred ninety-three thousand, one hundred fifty-two".