21920092 has 6 divisors (see below), whose sum is σ = 38360168. Its totient is φ = 10960044.

The previous prime is 21920057. The next prime is 21920113. The reversal of 21920092 is 29002912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2740008 + ... + 2740015.

Almost surely, 2^21920092 is an apocalyptic number.

It is an amenable number.

21920092 is a deficient number, since it is larger than the sum of its proper divisors (16440076).

21920092 is a wasteful number, since it uses less digits than its factorization.

21920092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5480027 (or 5480025 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 21920092 is about 4681.8897893906. The cubic root of 21920092 is about 279.8642709511.

The spelling of 21920092 in words is "twenty-one million, nine hundred twenty thousand, ninety-two".