20422225 has 12 divisors (see below), whose sum is σ = 25803036. Its totient is φ = 16028480.

The previous prime is 20422189. The next prime is 20422243. The reversal of 20422225 is 52222402.

It can be written as a sum of positive squares in 6 ways, for example, as 646416 + 19775809 = 804^2 + 4447^2 .

It is not a de Polignac number, because 20422225 - 2⁷ = 20422097 is a prime.

It is a Duffinian number.

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, 6382 + ... + 9031.

It is an arithmetic number, because the mean of its divisors is an integer number (2150253).

Almost surely, 2^20422225 is an apocalyptic number.

20422225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20422225 is a deficient number, since it is larger than the sum of its proper divisors (5380811).

20422225 is a wasteful number, since it uses less digits than its factorization.

20422225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15476 (or 15471 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20422225 is about 4519.0955953598. The cubic root of 20422225 is about 273.3386334817.

Adding to 20422225 its reverse (52222402), we get a palindrome (72644627).

The spelling of 20422225 in words is "twenty million, four hundred twenty-two thousand, two hundred twenty-five".