20415122 has 32 divisors (see below), whose sum is σ = 39336192. Its totient is φ = 7723584.

The previous prime is 20415119. The next prime is 20415133. The reversal of 20415122 is 22151402.

It is a self number, because there is not a number n which added to its sum of digits gives 20415122.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1748 + ... + 6624.

It is an arithmetic number, because the mean of its divisors is an integer number (1229256).

Almost surely, 2^20415122 is an apocalyptic number.

20415122 is a deficient number, since it is larger than the sum of its proper divisors (18921070).

20415122 is a wasteful number, since it uses less digits than its factorization.

20415122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20415122 is about 4518.3096396772. The cubic root of 20415122 is about 273.3069400783.

Adding to 20415122 its reverse (22151402), we get a palindrome (42566524).

The spelling of 20415122 in words is "twenty million, four hundred fifteen thousand, one hundred twenty-two".