21192448 has 36 divisors (see below), whose sum is σ = 44538760. Its totient is φ = 10036224.

The previous prime is 21192443. The next prime is 21192481. The reversal of 21192448 is 84429112.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2686 + ... + 7042.

Almost surely, 2^21192448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21192448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22269380).

21192448 is an abundant number, since it is smaller than the sum of its proper divisors (23346312).

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

21192448 is an equidigital number, since it uses as much as digits as its factorization.

21192448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4392 (or 4378 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 21192448 is about 4603.5256054463. The cubic root of 21192448 is about 276.7326330984.

The spelling of 21192448 in words is "twenty-one million, one hundred ninety-two thousand, four hundred forty-eight".