20422455 has 8 divisors (see below), whose sum is σ = 32675952. Its totient is φ = 10891968.

The previous prime is 20422447. The next prime is 20422499. The reversal of 20422455 is 55422402.

It is a happy number.

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

It is not a de Polignac number, because 20422455 - 2³ = 20422447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 680734 + ... + 680763.

It is an arithmetic number, because the mean of its divisors is an integer number (4084494).

Almost surely, 2^20422455 is an apocalyptic number.

20422455 is a deficient number, since it is larger than the sum of its proper divisors (12253497).

20422455 is a wasteful number, since it uses less digits than its factorization.

20422455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361505.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20422455 is about 4519.1210428578. The cubic root of 20422455 is about 273.3396596130.

Adding to 20422455 its reverse (55422402), we get a palindrome (75844857).

The spelling of 20422455 in words is "twenty million, four hundred twenty-two thousand, four hundred fifty-five".