21275032 has 8 divisors (see below), whose sum is σ = 39890700. Its totient is φ = 10637512.

The previous prime is 21275027. The next prime is 21275039. The reversal of 21275032 is 23057212.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 21274994 and 21275012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21275039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1329682 + ... + 1329697.

Almost surely, 2^21275032 is an apocalyptic number.

It is an amenable number.

21275032 is a deficient number, since it is larger than the sum of its proper divisors (18615668).

21275032 is a wasteful number, since it uses less digits than its factorization.

21275032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2659385 (or 2659381 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 21275032 is about 4612.4865311456. The cubic root of 21275032 is about 277.0916299449.

The spelling of 21275032 in words is "twenty-one million, two hundred seventy-five thousand, thirty-two".