20949334539 has 64 divisors (see below), whose sum is σ = 33530112000. Its totient is φ = 11385953280.

The previous prime is 20949334529. The next prime is 20949334541. The reversal of 20949334539 is 93543394902.

It is a happy number.

It is not a de Polignac number, because 20949334539 - 2²⁵ = 20915780107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20949334491 and 20949334500.

It is not an unprimeable number, because it can be changed into a prime (20949334529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7619337 + ... + 7622085.

It is an arithmetic number, because the mean of its divisors is an integer number (523908000).

Almost surely, 2^20949334539 is an apocalyptic number.

20949334539 is a deficient number, since it is larger than the sum of its proper divisors (12580777461).

20949334539 is a wasteful number, since it uses less digits than its factorization.

20949334539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3020.

The product of its (nonzero) digits is 3149280, while the sum is 51.

The spelling of 20949334539 in words is "twenty billion, nine hundred forty-nine million, three hundred thirty-four thousand, five hundred thirty-nine".