20002539533 has 4 divisors (see below), whose sum is σ = 20186049180. Its totient is φ = 19819029888.

The previous prime is 20002539451. The next prime is 20002539563. The reversal of 20002539533 is 33593520002.

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 14923554244 + 5078985289 = 122162^2 + 71267^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002539533 - 2²⁸ = 19734104077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20002539533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002539563) 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, 91754660 + ... + 91754877.

It is an arithmetic number, because the mean of its divisors is an integer number (5046512295).

Almost surely, 2^20002539533 is an apocalyptic number.

It is an amenable number.

20002539533 is a deficient number, since it is larger than the sum of its proper divisors (183509647).

20002539533 is a wasteful number, since it uses less digits than its factorization.

20002539533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183509646.

The product of its (nonzero) digits is 24300, while the sum is 32.

The spelling of 20002539533 in words is "twenty billion, two million, five hundred thirty-nine thousand, five hundred thirty-three".