20013542549 has 16 divisors (see below), whose sum is σ = 26871331200. Its totient is φ = 14395354560.

The previous prime is 20013542509. The next prime is 20013542561. The reversal of 20013542549 is 94524531002.

It is a cyclic number.

It is not a de Polignac number, because 20013542549 - 2⁸ = 20013542293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013542509) 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 15 ways as a sum of consecutive naturals, for example, 9995774 + ... + 9997775.

It is an arithmetic number, because the mean of its divisors is an integer number (1679458200).

Almost surely, 2^20013542549 is an apocalyptic number.

It is an amenable number.

20013542549 is a deficient number, since it is larger than the sum of its proper divisors (6857788651).

20013542549 is a wasteful number, since it uses less digits than its factorization.

20013542549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19993580.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 20013542549 in words is "twenty billion, thirteen million, five hundred forty-two thousand, five hundred forty-nine".