21800092 has 6 divisors (see below), whose sum is σ = 38150168. Its totient is φ = 10900044.

The previous prime is 21800089. The next prime is 21800101. The reversal of 21800092 is 29000812.

It is a super-2 number, since 2×21800092² = 950488022416928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2725008 + ... + 2725015.

Almost surely, 2^21800092 is an apocalyptic number.

It is an amenable number.

21800092 is a deficient number, since it is larger than the sum of its proper divisors (16350076).

21800092 is a wasteful number, since it uses less digits than its factorization.

21800092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5450027 (or 5450025 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 21800092 is about 4669.0568640787. The cubic root of 21800092 is about 279.3526370968.

The spelling of 21800092 in words is "twenty-one million, eight hundred thousand, ninety-two".