21823274 has 64 divisors (see below), whose sum is σ = 41057280. Its totient is φ = 8574720.

The previous prime is 21823271. The next prime is 21823301. The reversal of 21823274 is 47232812.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21823271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 369857 + ... + 369915.

It is an arithmetic number, because the mean of its divisors is an integer number (641520).

Almost surely, 2^21823274 is an apocalyptic number.

21823274 is a deficient number, since it is larger than the sum of its proper divisors (19234006).

21823274 is a wasteful number, since it uses less digits than its factorization.

21823274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155.

The product of its digits is 5376, while the sum is 29.

The square root of 21823274 is about 4671.5387186665. The cubic root of 21823274 is about 279.4516222861.

The spelling of 21823274 in words is "twenty-one million, eight hundred twenty-three thousand, two hundred seventy-four".