21473674 has 8 divisors (see below), whose sum is σ = 33611040. Its totient is φ = 10269996.

The previous prime is 21473671. The next prime is 21473707. The reversal of 21473674 is 47637412.

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

It is a super-2 number, since 2×21473674² = 922237350116552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21473671) 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, 233364 + ... + 233455.

It is an arithmetic number, because the mean of its divisors is an integer number (4201380).

Almost surely, 2^21473674 is an apocalyptic number.

21473674 is a deficient number, since it is larger than the sum of its proper divisors (12137366).

21473674 is a wasteful number, since it uses less digits than its factorization.

21473674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466844.

The product of its digits is 28224, while the sum is 34.

The square root of 21473674 is about 4633.9695726235. The cubic root of 21473674 is about 277.9513483863.

The spelling of 21473674 in words is "twenty-one million, four hundred seventy-three thousand, six hundred seventy-four".