20655222 has 32 divisors (see below), whose sum is σ = 48314112. Its totient is φ = 5763744.

The previous prime is 20655203. The next prime is 20655227. The reversal of 20655222 is 22255602.

It is a junction number, because it is equal to n+sod(n) for n = 20655192 and 20655201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3913 + ... + 7524.

It is an arithmetic number, because the mean of its divisors is an integer number (1509816).

Almost surely, 2^20655222 is an apocalyptic number.

20655222 is an abundant number, since it is smaller than the sum of its proper divisors (27658890).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20655222 is a wasteful number, since it uses less digits than its factorization.

20655222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11492.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20655222 is about 4544.8016458367. The cubic root of 20655222 is about 274.3742111977.

The spelling of 20655222 in words is "twenty million, six hundred fifty-five thousand, two hundred twenty-two".