21193848 has 48 divisors (see below), whose sum is σ = 61818120. Its totient is φ = 6520896.

The previous prime is 21193847. The next prime is 21193853. The reversal of 21193848 is 84839112.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21193841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10386 + ... + 12257.

Almost surely, 2^21193848 is an apocalyptic number.

It is an amenable number.

21193848 is an abundant number, since it is smaller than the sum of its proper divisors (40624272).

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

21193848 is a wasteful number, since it uses less digits than its factorization.

21193848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22668 (or 22661 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 21193848 is about 4603.6776603059. The cubic root of 21193848 is about 276.7387267338.

The spelling of 21193848 in words is "twenty-one million, one hundred ninety-three thousand, eight hundred forty-eight".