21973714 has 8 divisors (see below), whose sum is σ = 37669248. Its totient is φ = 9417300.

The previous prime is 21973697. The next prime is 21973729. The reversal of 21973714 is 41737912.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21973714.

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, 784762 + ... + 784789.

It is an arithmetic number, because the mean of its divisors is an integer number (4708656).

Almost surely, 2^21973714 is an apocalyptic number.

21973714 is a deficient number, since it is larger than the sum of its proper divisors (15695534).

21973714 is a wasteful number, since it uses less digits than its factorization.

21973714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569560.

The product of its digits is 10584, while the sum is 34.

The square root of 21973714 is about 4687.6128253088. The cubic root of 21973714 is about 280.0922910051.

The spelling of 21973714 in words is "twenty-one million, nine hundred seventy-three thousand, seven hundred fourteen".