21627674 has 8 divisors (see below), whose sum is σ = 32546100. Its totient is φ = 10778976.

The previous prime is 21627629. The next prime is 21627679. The reversal of 21627674 is 47672612.

It can be written as a sum of positive squares in 2 ways, for example, as 21557449 + 70225 = 4643^2 + 265^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21627679) 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, 16649 + ... + 17900.

Almost surely, 2^21627674 is an apocalyptic number.

21627674 is a deficient number, since it is larger than the sum of its proper divisors (10918426).

21627674 is a wasteful number, since it uses less digits than its factorization.

21627674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34864.

The product of its digits is 28224, while the sum is 35.

The square root of 21627674 is about 4650.5563108084. The cubic root of 21627674 is about 278.6142156751.

The spelling of 21627674 in words is "twenty-one million, six hundred twenty-seven thousand, six hundred seventy-four".