20406122 has 16 divisors (see below), whose sum is σ = 34470144. Its totient is φ = 8976000.

The previous prime is 20406119. The next prime is 20406143. The reversal of 20406122 is 22160402.

It is a self number, because there is not a number n which added to its sum of digits gives 20406122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14279 + ... + 15642.

It is an arithmetic number, because the mean of its divisors is an integer number (2154384).

Almost surely, 2^20406122 is an apocalyptic number.

20406122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20406122 is a deficient number, since it is larger than the sum of its proper divisors (14064022).

20406122 is a wasteful number, since it uses less digits than its factorization.

20406122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29965.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 20406122 is about 4517.3135822079. The cubic root of 20406122 is about 273.2667717493.

Adding to 20406122 its reverse (22160402), we get a palindrome (42566524).

The spelling of 20406122 in words is "twenty million, four hundred six thousand, one hundred twenty-two".