20422285 has 8 divisors (see below), whose sum is σ = 26391960. Its totient is φ = 15081024.

The previous prime is 20422277. The next prime is 20422309. The reversal of 20422285 is 58222402.

It can be written as a sum of positive squares in 4 ways, for example, as 91204 + 20331081 = 302^2 + 4509^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20422285 - 2³ = 20422277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157030 + ... + 157159.

It is an arithmetic number, because the mean of its divisors is an integer number (3298995).

Almost surely, 2^20422285 is an apocalyptic number.

It is an amenable number.

20422285 is a deficient number, since it is larger than the sum of its proper divisors (5969675).

20422285 is a wasteful number, since it uses less digits than its factorization.

20422285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314207.

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 20422285 is about 4519.1022338513. The cubic root of 20422285 is about 273.3389011689.

Adding to 20422285 its reverse (58222402), we get a palindrome (78644687).

The spelling of 20422285 in words is "twenty million, four hundred twenty-two thousand, two hundred eighty-five".