20160172065 has 32 divisors (see below), whose sum is σ = 35852616576. Its totient is φ = 9590197760.

The previous prime is 20160172009. The next prime is 20160172069. The reversal of 20160172065 is 56027106102.

It is not a de Polignac number, because 20160172065 - 2⁶ = 20160172001 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20160172069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1143924 + ... + 1161413.

It is an arithmetic number, because the mean of its divisors is an integer number (1120394268).

Almost surely, 2^20160172065 is an apocalyptic number.

It is an amenable number.

20160172065 is a deficient number, since it is larger than the sum of its proper divisors (15692444511).

20160172065 is a wasteful number, since it uses less digits than its factorization.

20160172065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305409.

The product of its (nonzero) digits is 5040, while the sum is 30.

Adding to 20160172065 its reverse (56027106102), we get a palindrome (76187278167).

The spelling of 20160172065 in words is "twenty billion, one hundred sixty million, one hundred seventy-two thousand, sixty-five".