21233148 has 24 divisors (see below), whose sum is σ = 49679952. Its totient is φ = 7058304.

The previous prime is 21233131. The next prime is 21233161. The reversal of 21233148 is 84133212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2536 + ... + 6992.

It is an arithmetic number, because the mean of its divisors is an integer number (2069998).

Almost surely, 2^21233148 is an apocalyptic number.

It is an amenable number.

21233148 is an abundant number, since it is smaller than the sum of its proper divisors (28446804).

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

21233148 is a wasteful number, since it uses less digits than its factorization.

21233148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861 (or 4859 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 21233148 is about 4607.9440100765. The cubic root of 21233148 is about 276.9096743988.

The spelling of 21233148 in words is "twenty-one million, two hundred thirty-three thousand, one hundred forty-eight".