20636922 has 16 divisors (see below), whose sum is σ = 42697440. Its totient is φ = 6641712.

The previous prime is 20636879. The next prime is 20636923. The reversal of 20636922 is 22963602.

It is a self number, because there is not a number n which added to its sum of digits gives 20636922.

It is not an unprimeable number, because it can be changed into a prime (20636923) 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, 59128 + ... + 59475.

It is an arithmetic number, because the mean of its divisors is an integer number (2668590).

Almost surely, 2^20636922 is an apocalyptic number.

20636922 is an abundant number, since it is smaller than the sum of its proper divisors (22060518).

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

20636922 is a wasteful number, since it uses less digits than its factorization.

20636922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118637.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 20636922 is about 4542.7879105237. The cubic root of 20636922 is about 274.2931577376.

It can be divided in two parts, 206 and 36922, that added together give a triangular number (37128 = T₂₇₂).

The spelling of 20636922 in words is "twenty million, six hundred thirty-six thousand, nine hundred twenty-two".