21995846 has 8 divisors (see below), whose sum is σ = 33139800. Its totient is φ = 10949248.

The previous prime is 21995839. The next prime is 21995893. The reversal of 21995846 is 64859912.

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

It is a junction number, because it is equal to n+sod(n) for n = 21995797 and 21995806.

It is a congruent 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, 23771 + ... + 24678.

It is an arithmetic number, because the mean of its divisors is an integer number (4142475).

Almost surely, 2^21995846 is an apocalyptic number.

21995846 is a deficient number, since it is larger than the sum of its proper divisors (11143954).

21995846 is a wasteful number, since it uses less digits than its factorization.

21995846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48678.

The product of its digits is 155520, while the sum is 44.

The square root of 21995846 is about 4689.9729210306. The cubic root of 21995846 is about 280.1862960897.

The spelling of 21995846 in words is "twenty-one million, nine hundred ninety-five thousand, eight hundred forty-six".