20422355 has 8 divisors (see below), whose sum is σ = 25948512. Its totient is φ = 15376768.

The previous prime is 20422343. The next prime is 20422357. The reversal of 20422355 is 55322402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20422355 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20422355.

It is not an unprimeable number, because it can be changed into a prime (20422357) 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, 120047 + ... + 120216.

It is an arithmetic number, because the mean of its divisors is an integer number (3243564).

Almost surely, 2^20422355 is an apocalyptic number.

20422355 is a deficient number, since it is larger than the sum of its proper divisors (5526157).

20422355 is a wasteful number, since it uses less digits than its factorization.

20422355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240285.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20422355 is about 4519.1099787458. The cubic root of 20422355 is about 273.3392134699.

Adding to 20422355 its reverse (55322402), we get a palindrome (75744757).

The spelling of 20422355 in words is "twenty million, four hundred twenty-two thousand, three hundred fifty-five".