21146932 has 12 divisors (see below), whose sum is σ = 37514596. Its totient is φ = 10428480.

The previous prime is 21146921. The next prime is 21146953. The reversal of 21146932 is 23964112.

It can be written as a sum of positive squares in 2 ways, for example, as 12702096 + 8444836 = 3564^2 + 2906^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21146932.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35919 + ... + 36502.

Almost surely, 2^21146932 is an apocalyptic number.

It is an amenable number.

21146932 is a deficient number, since it is larger than the sum of its proper divisors (16367664).

21146932 is a wasteful number, since it uses less digits than its factorization.

21146932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72498 (or 72496 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 21146932 is about 4598.5793458415. The cubic root of 21146932 is about 276.5343739386.

The spelling of 21146932 in words is "twenty-one million, one hundred forty-six thousand, nine hundred thirty-two".