20333905189 has 4 divisors (see below), whose sum is σ = 21898051756. Its totient is φ = 18769758624.

The previous prime is 20333905183. The next prime is 20333905213. The reversal of 20333905189 is 98150933302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2424774564 + 17909130625 = 49242^2 + 133825^2 .

It is a cyclic number.

It is not a de Polignac number, because 20333905189 - 2²³ = 20325516581 is a prime.

It is a super-2 number, since 2×20333905189² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20333905183) 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, 782073264 + ... + 782073289.

It is an arithmetic number, because the mean of its divisors is an integer number (5474512939).

Almost surely, 2^20333905189 is an apocalyptic number.

It is an amenable number.

20333905189 is a deficient number, since it is larger than the sum of its proper divisors (1564146567).

20333905189 is a wasteful number, since it uses less digits than its factorization.

20333905189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564146566.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 20333905189 in words is "twenty billion, three hundred thirty-three million, nine hundred five thousand, one hundred eighty-nine".