21674894 has 8 divisors (see below), whose sum is σ = 32537208. Its totient is φ = 10829160.

The previous prime is 21674857. The next prime is 21674899. The reversal of 21674894 is 49847612.

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

It is a super-2 number, since 2×21674894² = 939602059822472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21674899) 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, 77 + ... + 6584.

It is an arithmetic number, because the mean of its divisors is an integer number (4067151).

Almost surely, 2^21674894 is an apocalyptic number.

21674894 is a deficient number, since it is larger than the sum of its proper divisors (10862314).

21674894 is a wasteful number, since it uses less digits than its factorization.

21674894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8290.

The product of its digits is 96768, while the sum is 41.

The square root of 21674894 is about 4655.6303547425. The cubic root of 21674894 is about 278.8168357100.

The spelling of 21674894 in words is "twenty-one million, six hundred seventy-four thousand, eight hundred ninety-four".