21048272 has 20 divisors (see below), whose sum is σ = 46607136. Its totient is φ = 9020640.

The previous prime is 21048263. The next prime is 21048281. The reversal of 21048272 is 27284012.

It is an interprime number because it is at equal distance from previous prime (21048263) and next prime (21048281).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93854 + ... + 94077.

Almost surely, 2^21048272 is an apocalyptic number.

It is an amenable number.

21048272 is an abundant number, since it is smaller than the sum of its proper divisors (25558864).

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

21048272 is a wasteful number, since it uses less digits than its factorization.

21048272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187946 (or 187940 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 21048272 is about 4587.8395787124. The cubic root of 21048272 is about 276.1036507705.

The spelling of 21048272 in words is "twenty-one million, forty-eight thousand, two hundred seventy-two".