21252948 has 48 divisors (see below), whose sum is σ = 51429504. Its totient is φ = 6825600.

The previous prime is 21252919. The next prime is 21252953. The reversal of 21252948 is 84925212.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66886 + ... + 67202.

It is an arithmetic number, because the mean of its divisors is an integer number (1071448).

Almost surely, 2^21252948 is an apocalyptic number.

It is an amenable number.

21252948 is an abundant number, since it is smaller than the sum of its proper divisors (30176556).

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

21252948 is a wasteful number, since it uses less digits than its factorization.

21252948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 510 counting only the distinct ones).

The product of its digits is 11520, while the sum is 33.

The square root of 21252948 is about 4610.0919730522. The cubic root of 21252948 is about 276.9957208043.

The spelling of 21252948 in words is "twenty-one million, two hundred fifty-two thousand, nine hundred forty-eight".