21829674 has 8 divisors (see below), whose sum is σ = 43659360. Its totient is φ = 7276556.

The previous prime is 21829669. The next prime is 21829699. The reversal of 21829674 is 47692812.

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

21829674 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1819134 + ... + 1819145.

It is an arithmetic number, because the mean of its divisors is an integer number (5457420).

Almost surely, 2^21829674 is an apocalyptic number.

21829674 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21829674 is a wasteful number, since it uses less digits than its factorization.

21829674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638284.

The product of its digits is 48384, while the sum is 39.

The square root of 21829674 is about 4672.2236675913. The cubic root of 21829674 is about 279.4789373990.

It can be divided in two parts, 218 and 29674, that added together give a palindrome (29892).

The spelling of 21829674 in words is "twenty-one million, eight hundred twenty-nine thousand, six hundred seventy-four".