21930674 has 8 divisors (see below), whose sum is σ = 34627440. Its totient is φ = 10388196.

The previous prime is 21930673. The next prime is 21930679. The reversal of 21930674 is 47603912.

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 21930674.

It is not an unprimeable number, because it can be changed into a prime (21930673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288524 + ... + 288599.

It is an arithmetic number, because the mean of its divisors is an integer number (4328430).

Almost surely, 2^21930674 is an apocalyptic number.

21930674 is a deficient number, since it is larger than the sum of its proper divisors (12696766).

21930674 is a wasteful number, since it uses less digits than its factorization.

21930674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577144.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 21930674 is about 4683.0197522539. The cubic root of 21930674 is about 279.9092988534.

The spelling of 21930674 in words is "twenty-one million, nine hundred thirty thousand, six hundred seventy-four".