21983466 has 8 divisors (see below), whose sum is σ = 43966944. Its totient is φ = 7327820.

The previous prime is 21983453. The next prime is 21983483. The reversal of 21983466 is 66438912.

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

21983466 is an admirable number.

It is a plaindrome in base 11.

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, 1831950 + ... + 1831961.

It is an arithmetic number, because the mean of its divisors is an integer number (5495868).

Almost surely, 2^21983466 is an apocalyptic number.

21983466 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.

21983466 is a wasteful number, since it uses less digits than its factorization.

21983466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663916.

The product of its digits is 62208, while the sum is 39.

The square root of 21983466 is about 4688.6528982214. The cubic root of 21983466 is about 280.1337201425.

The spelling of 21983466 in words is "twenty-one million, nine hundred eighty-three thousand, four hundred sixty-six".