21882745 has 8 divisors (see below), whose sum is σ = 27106560. Its totient is φ = 16941360.

The previous prime is 21882739. The next prime is 21882781. The reversal of 21882745 is 54728812.

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

It is not a de Polignac number, because 21882745 - 2¹¹ = 21880697 is a prime.

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, 70435 + ... + 70744.

It is an arithmetic number, because the mean of its divisors is an integer number (3388320).

Almost surely, 2^21882745 is an apocalyptic number.

It is an amenable number.

21882745 is a deficient number, since it is larger than the sum of its proper divisors (5223815).

21882745 is a wasteful number, since it uses less digits than its factorization.

21882745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141215.

The product of its digits is 35840, while the sum is 37.

The square root of 21882745 is about 4677.8996355202. The cubic root of 21882745 is about 279.7052382766.

The spelling of 21882745 in words is "twenty-one million, eight hundred eighty-two thousand, seven hundred forty-five".