21200092 has 12 divisors (see below), whose sum is σ = 37167480. Its totient is φ = 10580816.

The previous prime is 21200083. The next prime is 21200093. The reversal of 21200092 is 29000212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2167 + ... + 6862.

It is an arithmetic number, because the mean of its divisors is an integer number (3097290).

Almost surely, 2^21200092 is an apocalyptic number.

It is an amenable number.

21200092 is a deficient number, since it is larger than the sum of its proper divisors (15967388).

21200092 is a wasteful number, since it uses less digits than its factorization.

21200092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620 (or 9618 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 21200092 is about 4604.3557638393. The cubic root of 21200092 is about 276.7659010809.

The spelling of 21200092 in words is "twenty-one million, two hundred thousand, ninety-two".