21092952 has 16 divisors (see below), whose sum is σ = 52732440. Its totient is φ = 7030976.

The previous prime is 21092933. The next prime is 21092957. The reversal of 21092952 is 25929012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21092957) 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, 439413 + ... + 439460.

Almost surely, 2^21092952 is an apocalyptic number.

It is an amenable number.

21092952 is an abundant number, since it is smaller than the sum of its proper divisors (31639488).

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

21092952 is a wasteful number, since it uses less digits than its factorization.

21092952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878882 (or 878878 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 21092952 is about 4592.7063916606. The cubic root of 21092952 is about 276.2988780790.

The spelling of 21092952 in words is "twenty-one million, ninety-two thousand, nine hundred fifty-two".