20221994 has 8 divisors (see below), whose sum is σ = 32666340. Its totient is φ = 9333216.

The previous prime is 20221987. The next prime is 20222003. The reversal of 20221994 is 49912202.

It can be written as a sum of positive squares in 2 ways, for example, as 14341369 + 5880625 = 3787^2 + 2425^2 .

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

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, 388859 + ... + 388910.

Almost surely, 2^20221994 is an apocalyptic number.

20221994 is a deficient number, since it is larger than the sum of its proper divisors (12444346).

20221994 is a wasteful number, since it uses less digits than its factorization.

20221994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777784.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20221994 is about 4496.8871455708. The cubic root of 20221994 is about 272.4423759421.

The spelling of 20221994 in words is "twenty million, two hundred twenty-one thousand, nine hundred ninety-four".