21373282 has 16 divisors (see below), whose sum is σ = 36836352. Its totient is φ = 9110880.

The previous prime is 21373277. The next prime is 21373327. The reversal of 21373282 is 28237312.

It is a self number, because there is not a number n which added to its sum of digits gives 21373282.

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, 1323 + ... + 6670.

It is an arithmetic number, because the mean of its divisors is an integer number (2302272).

Almost surely, 2^21373282 is an apocalyptic number.

21373282 is a deficient number, since it is larger than the sum of its proper divisors (15463070).

21373282 is a wasteful number, since it uses less digits than its factorization.

21373282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8193.

The product of its digits is 4032, while the sum is 28.

The square root of 21373282 is about 4623.1247008922. The cubic root of 21373282 is about 277.5175196579.

The spelling of 21373282 in words is "twenty-one million, three hundred seventy-three thousand, two hundred eighty-two".