21992262 has 8 divisors (see below), whose sum is σ = 43984536. Its totient is φ = 7330752.

The previous prime is 21992249. The next prime is 21992273. The reversal of 21992262 is 26229912.

It is a sphenic number, since it is the product of 3 distinct primes.

21992262 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1832683 + ... + 1832694.

It is an arithmetic number, because the mean of its divisors is an integer number (5498067).

Almost surely, 2^21992262 is an apocalyptic number.

21992262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21992262 is a wasteful number, since it uses less digits than its factorization.

21992262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3665382.

The product of its digits is 7776, while the sum is 33.

The square root of 21992262 is about 4689.5908137065. The cubic root of 21992262 is about 280.1710774248.

The spelling of 21992262 in words is "twenty-one million, nine hundred ninety-two thousand, two hundred sixty-two".