20505622 has 16 divisors (see below), whose sum is σ = 31710240. Its totient is φ = 9937728.

The previous prime is 20505619. The next prime is 20505623. The reversal of 20505622 is 22650502.

It is a junction number, because it is equal to n+sod(n) for n = 20505593 and 20505602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20505623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35754 + ... + 36322.

It is an arithmetic number, because the mean of its divisors is an integer number (1981890).

Almost surely, 2^20505622 is an apocalyptic number.

20505622 is a deficient number, since it is larger than the sum of its proper divisors (11204618).

20505622 is a wasteful number, since it uses less digits than its factorization.

20505622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20505622 is about 4528.3133725483. The cubic root of 20505622 is about 273.7102002841.

The spelling of 20505622 in words is "twenty million, five hundred five thousand, six hundred twenty-two".