20122655 has 8 divisors (see below), whose sum is σ = 27596832. Its totient is φ = 13798368.

The previous prime is 20122651. The next prime is 20122673. The reversal of 20122655 is 55622102.

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 20122655 - 2² = 20122651 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 20122655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122651) 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, 287432 + ... + 287501.

It is an arithmetic number, because the mean of its divisors is an integer number (3449604).

Almost surely, 2^20122655 is an apocalyptic number.

20122655 is a deficient number, since it is larger than the sum of its proper divisors (7474177).

20122655 is an equidigital number, since it uses as much as digits as its factorization.

20122655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574945.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20122655 is about 4485.8282401358. The cubic root of 20122655 is about 271.9955259861.

Adding to 20122655 its reverse (55622102), we get a palindrome (75744757).

The spelling of 20122655 in words is "twenty million, one hundred twenty-two thousand, six hundred fifty-five".