21032292 has 12 divisors (see below), whose sum is σ = 49075376. Its totient is φ = 7010760.

The previous prime is 21032287. The next prime is 21032293. The reversal of 21032292 is 29223012.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21032293) by changing a digit.

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, 876334 + ... + 876357.

Almost surely, 2^21032292 is an apocalyptic number.

It is an amenable number.

21032292 is an abundant number, since it is smaller than the sum of its proper divisors (28043084).

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

21032292 is a wasteful number, since it uses less digits than its factorization.

21032292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752698 (or 1752696 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21032292 is about 4586.0976875771. The cubic root of 21032292 is about 276.0337597855.

The spelling of 21032292 in words is "twenty-one million, thirty-two thousand, two hundred ninety-two".