21992283 has 16 divisors (see below), whose sum is σ = 32691360. Its totient is φ = 14611968.

The previous prime is 21992273. The next prime is 21992293. The reversal of 21992283 is 38229912.

It is an interprime number because it is at equal distance from previous prime (21992273) and next prime (21992293).

It is not a de Polignac number, because 21992283 - 2⁶ = 21992219 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (21992273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7891 + ... + 10307.

It is an arithmetic number, because the mean of its divisors is an integer number (2043210).

Almost surely, 2^21992283 is an apocalyptic number.

21992283 is a deficient number, since it is larger than the sum of its proper divisors (10699077).

21992283 is a wasteful number, since it uses less digits than its factorization.

21992283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763 (or 2757 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 21992283 is about 4689.5930527072. The cubic root of 21992283 is about 280.1711666014.

The spelling of 21992283 in words is "twenty-one million, nine hundred ninety-two thousand, two hundred eighty-three".