20422170 has 24 divisors (see below), whose sum is σ = 53097876. Its totient is φ = 5445888.

The previous prime is 20422159. The next prime is 20422189. The reversal of 20422170 is 7122402.

It can be written as a sum of positive squares in 2 ways, for example, as 20277009 + 145161 = 4503^2 + 381^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113367 + ... + 113546.

Almost surely, 2^20422170 is an apocalyptic number.

20422170 is an abundant number, since it is smaller than the sum of its proper divisors (32675706).

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

20422170 is a wasteful number, since it uses less digits than its factorization.

20422170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226926 (or 226923 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20422170 is about 4519.0895100673. The cubic root of 20422170 is about 273.3383881014.

Adding to 20422170 its reverse (7122402), we get a palindrome (27544572).

The spelling of 20422170 in words is "twenty million, four hundred twenty-two thousand, one hundred seventy".