20115206033 has 4 divisors (see below), whose sum is σ = 21662529588. Its totient is φ = 18567882480.

The previous prime is 20115205973. The next prime is 20115206047. The reversal of 20115206033 is 33060251102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33060251102 = 2 ⋅16530125551.

It can be written as a sum of positive squares in 2 ways, for example, as 9046482769 + 11068723264 = 95113^2 + 105208^2 .

It is a cyclic number.

It is not a de Polignac number, because 20115206033 - 2²⁶ = 20048097169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20115206333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773661758 + ... + 773661783.

It is an arithmetic number, because the mean of its divisors is an integer number (5415632397).

Almost surely, 2^20115206033 is an apocalyptic number.

It is an amenable number.

20115206033 is a deficient number, since it is larger than the sum of its proper divisors (1547323555).

20115206033 is a wasteful number, since it uses less digits than its factorization.

20115206033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547323554.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 20115206033 its reverse (33060251102), we get a palindrome (53175457135).

The spelling of 20115206033 in words is "twenty billion, one hundred fifteen million, two hundred six thousand, thirty-three".