20172310416 has 80 divisors (see below), whose sum is σ = 58077344320. Its totient is φ = 6703741440.

The previous prime is 20172310363. The next prime is 20172310427. The reversal of 20172310416 is 61401327102.

20172310416 is a `hidden beast` number, since 2 + 0 + 17 + 231 + 0 + 416 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20172310416.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72456 + ... + 213528.

It is an arithmetic number, because the mean of its divisors is an integer number (725966804).

Almost surely, 2^20172310416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20172310416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29038672160).

20172310416 is an abundant number, since it is smaller than the sum of its proper divisors (37905033904).

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

20172310416 is a wasteful number, since it uses less digits than its factorization.

20172310416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141421 (or 141409 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 20172310416 its reverse (61401327102), we get a palindrome (81573637518).

The spelling of 20172310416 in words is "twenty billion, one hundred seventy-two million, three hundred ten thousand, four hundred sixteen".