21893122 has 8 divisors (see below), whose sum is σ = 33727356. Its totient is φ = 10650672.

The previous prime is 21893107. The next prime is 21893141. The reversal of 21893122 is 22139812.

It can be written as a sum of positive squares in 2 ways, for example, as 21893041 + 81 = 4679^2 + 9^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147853 + ... + 148000.

Almost surely, 2^21893122 is an apocalyptic number.

21893122 is a deficient number, since it is larger than the sum of its proper divisors (11834234).

21893122 is a wasteful number, since it uses less digits than its factorization.

21893122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295892.

The product of its digits is 1728, while the sum is 28.

The square root of 21893122 is about 4679.0086556877. The cubic root of 21893122 is about 279.7494442264.

The spelling of 21893122 in words is "twenty-one million, eight hundred ninety-three thousand, one hundred twenty-two".