20221394 has 8 divisors (see below), whose sum is σ = 30386928. Its totient is φ = 10092420.

The previous prime is 20221391. The next prime is 20221403. The reversal of 20221394 is 49312202.

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

It is not an unprimeable number, because it can be changed into a prime (20221391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7712 + ... + 9995.

It is an arithmetic number, because the mean of its divisors is an integer number (3798366).

Almost surely, 2^20221394 is an apocalyptic number.

20221394 is a deficient number, since it is larger than the sum of its proper divisors (10165534).

20221394 is a wasteful number, since it uses less digits than its factorization.

20221394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18280.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20221394 is about 4496.8204322610. The cubic root of 20221394 is about 272.4396814000.

Adding to 20221394 its reverse (49312202), we get a palindrome (69533596).

The spelling of 20221394 in words is "twenty million, two hundred twenty-one thousand, three hundred ninety-four".