21192048 has 60 divisors (see below), whose sum is σ = 59618208. Its totient is φ = 7027200.

The previous prime is 21192043. The next prime is 21192091. The reversal of 21192048 is 84029112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21192043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52648 + ... + 53048.

Almost surely, 2^21192048 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 21192048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29809104).

21192048 is an abundant number, since it is smaller than the sum of its proper divisors (38426160).

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

21192048 is a wasteful number, since it uses less digits than its factorization.

21192048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 21192048 is about 4603.4821602782. The cubic root of 21192048 is about 276.7308920104.

The spelling of 21192048 in words is "twenty-one million, one hundred ninety-two thousand, forty-eight".