21492892 has 12 divisors (see below), whose sum is σ = 37704856. Its totient is φ = 10720080.

The previous prime is 21492883. The next prime is 21492937. The reversal of 21492892 is 29829412.

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, 4698 + ... + 8065.

Almost surely, 2^21492892 is an apocalyptic number.

It is an amenable number.

21492892 is a deficient number, since it is larger than the sum of its proper divisors (16211964).

21492892 is a wasteful number, since it uses less digits than its factorization.

21492892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13188 (or 13186 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 21492892 is about 4636.0427090354. The cubic root of 21492892 is about 278.0342417667.

It can be divided in two parts, 2149 and 2892, that added together give a square (5041 = 71²).

The spelling of 21492892 in words is "twenty-one million, four hundred ninety-two thousand, eight hundred ninety-two".