21674230 has 16 divisors (see below), whose sum is σ = 40068720. Its totient is φ = 8435232.

The previous prime is 21674227. The next prime is 21674249. The reversal of 21674230 is 3247612.

It is a junction number, because it is equal to n+sod(n) for n = 21674195 and 21674204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28920 + ... + 29659.

It is an arithmetic number, because the mean of its divisors is an integer number (2504295).

Almost surely, 2^21674230 is an apocalyptic number.

21674230 is a deficient number, since it is larger than the sum of its proper divisors (18394490).

21674230 is a wasteful number, since it uses less digits than its factorization.

21674230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58623.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 21674230 is about 4655.5590426929. The cubic root of 21674230 is about 278.8139885408.

It can be divided in two parts, 21674 and 230, that added together give a square (21904 = 148²).

The spelling of 21674230 in words is "twenty-one million, six hundred seventy-four thousand, two hundred thirty".