20185035233 has 6 divisors (see below), whose sum is σ = 22186857042. Its totient is φ = 18350031920.

The previous prime is 20185035229. The next prime is 20185035251. The reversal of 20185035233 is 33253058102.

It can be written as a sum of positive squares in only one way, i.e., 19234361344 + 950673889 = 138688^2 + 30833^2 .

It is not a de Polignac number, because 20185035233 - 2² = 20185035229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20185035233.

It is not an unprimeable number, because it can be changed into a prime (20185035203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83409116 + ... + 83409357.

It is an arithmetic number, because the mean of its divisors is an integer number (3697809507).

Almost surely, 2^20185035233 is an apocalyptic number.

It is an amenable number.

20185035233 is a deficient number, since it is larger than the sum of its proper divisors (2001821809).

20185035233 is a wasteful number, since it uses less digits than its factorization.

20185035233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166818495 (or 166818484 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 20185035233 in words is "twenty billion, one hundred eighty-five million, thirty-five thousand, two hundred thirty-three".