21132148 has 24 divisors (see below), whose sum is σ = 37920960. Its totient is φ = 10300800.

The previous prime is 21132131. The next prime is 21132191. The reversal of 21132148 is 84123112.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35340 + ... + 35932.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^21132148 is an apocalyptic number.

It is an amenable number.

21132148 is a deficient number, since it is larger than the sum of its proper divisors (16788812).

21132148 is a wasteful number, since it uses less digits than its factorization.

21132148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807 (or 805 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 21132148 is about 4596.9716118332. The cubic root of 21132148 is about 276.4699164045.

The spelling of 21132148 in words is "twenty-one million, one hundred thirty-two thousand, one hundred forty-eight".