20422146 has 16 divisors (see below), whose sum is σ = 41116608. Its totient is φ = 6762000.

The previous prime is 20422139. The next prime is 20422147. The reversal of 20422146 is 64122402.

20422146 is nontrivially palindromic in base 7.

It is not an unprimeable number, because it can be changed into a prime (20422147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10365 + ... + 12176.

It is an arithmetic number, because the mean of its divisors is an integer number (2569788).

Almost surely, 2^20422146 is an apocalyptic number.

20422146 is an abundant number, since it is smaller than the sum of its proper divisors (20694462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20422146 is a wasteful number, since it uses less digits than its factorization.

20422146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22697.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 20422146 is about 4519.0868546643. The cubic root of 20422146 is about 273.3382810262.

Adding to 20422146 its reverse (64122402), we get a palindrome (84544548).

The spelling of 20422146 in words is "twenty million, four hundred twenty-two thousand, one hundred forty-six".