20806122 has 16 divisors (see below), whose sum is σ = 43421760. Its totient is φ = 6633792.

The previous prime is 20806117. The next prime is 20806127. The reversal of 20806122 is 22160802.

It is an interprime number because it is at equal distance from previous prime (20806117) and next prime (20806127).

It is not an unprimeable number, because it can be changed into a prime (20806127) 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, 75247 + ... + 75522.

It is an arithmetic number, because the mean of its divisors is an integer number (2713860).

Almost surely, 2^20806122 is an apocalyptic number.

20806122 is an abundant number, since it is smaller than the sum of its proper divisors (22615638).

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

20806122 is a wasteful number, since it uses less digits than its factorization.

20806122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150797.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 20806122 is about 4561.3728196673. The cubic root of 20806122 is about 275.0407520874.

Adding to 20806122 its reverse (22160802), we get a palindrome (42966924).

The spelling of 20806122 in words is "twenty million, eight hundred six thousand, one hundred twenty-two".