21934718 has 8 divisors (see below), whose sum is σ = 35433048. Its totient is φ = 10123704.

The previous prime is 21934711. The next prime is 21934723. The reversal of 21934718 is 81743912.

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

It is a super-2 number, since 2×21934718² = 962263707479048, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21934711) 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, 421796 + ... + 421847.

It is an arithmetic number, because the mean of its divisors is an integer number (4429131).

Almost surely, 2^21934718 is an apocalyptic number.

21934718 is a deficient number, since it is larger than the sum of its proper divisors (13498330).

21934718 is a wasteful number, since it uses less digits than its factorization.

21934718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843658.

The product of its digits is 12096, while the sum is 35.

The square root of 21934718 is about 4683.4515050334. The cubic root of 21934718 is about 279.9265028183.

The spelling of 21934718 in words is "twenty-one million, nine hundred thirty-four thousand, seven hundred eighteen".