21929314 has 12 divisors (see below), whose sum is σ = 36156582. Its totient is φ = 9967760.

The previous prime is 21929293. The next prime is 21929321. The reversal of 21929314 is 41392912.

It can be written as a sum of positive squares in only one way, i.e., 11256025 + 10673289 = 3355^2 + 3267^2 .

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 5 ways as a sum of consecutive naturals, for example, 45067 + ... + 45550.

Almost surely, 2^21929314 is an apocalyptic number.

21929314 is a deficient number, since it is larger than the sum of its proper divisors (14227268).

21929314 is a wasteful number, since it uses less digits than its factorization.

21929314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90641 (or 90630 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 21929314 is about 4682.8745445506. The cubic root of 21929314 is about 279.9035126729.

The spelling of 21929314 in words is "twenty-one million, nine hundred twenty-nine thousand, three hundred fourteen".