21992914 has 4 divisors (see below), whose sum is σ = 32989374. Its totient is φ = 10996456.

The previous prime is 21992897. The next prime is 21992923. The reversal of 21992914 is 41929912.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13082689 + 8910225 = 3617^2 + 2985^2 .

It is a super-2 number, since 2×21992914² = 967376532422792, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5498227 + ... + 5498230.

Almost surely, 2^21992914 is an apocalyptic number.

21992914 is a deficient number, since it is larger than the sum of its proper divisors (10996460).

21992914 is a wasteful number, since it uses less digits than its factorization.

21992914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10996459.

The product of its digits is 11664, while the sum is 37.

The square root of 21992914 is about 4689.6603288511. The cubic root of 21992914 is about 280.1738461219.

The spelling of 21992914 in words is "twenty-one million, nine hundred ninety-two thousand, nine hundred fourteen".