20156716122 has 16 divisors (see below), whose sum is σ = 40621169952. Its totient is φ = 6667615760.

The previous prime is 20156716121. The next prime is 20156716141. The reversal of 20156716122 is 22161765102.

It is not an unprimeable number, because it can be changed into a prime (20156716121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12821553 + ... + 12823124.

It is an arithmetic number, because the mean of its divisors is an integer number (2538823122).

Almost surely, 2^20156716122 is an apocalyptic number.

20156716122 is an abundant number, since it is smaller than the sum of its proper divisors (20464453830).

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

20156716122 is a wasteful number, since it uses less digits than its factorization.

20156716122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25644813.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 20156716122 in words is "twenty billion, one hundred fifty-six million, seven hundred sixteen thousand, one hundred twenty-two".