20001541539 has 32 divisors (see below), whose sum is σ = 32280353280. Its totient is φ = 10754145792.

The previous prime is 20001541519. The next prime is 20001541601. The reversal of 20001541539 is 93514510002.

It is not a de Polignac number, because 20001541539 - 2⁷ = 20001541411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20001541519) 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 31 ways as a sum of consecutive naturals, for example, 2018892 + ... + 2028774.

It is an arithmetic number, because the mean of its divisors is an integer number (1008761040).

Almost surely, 2^20001541539 is an apocalyptic number.

20001541539 is a deficient number, since it is larger than the sum of its proper divisors (12278811741).

20001541539 is a wasteful number, since it uses less digits than its factorization.

20001541539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15579.

The product of its (nonzero) digits is 5400, while the sum is 30.

The spelling of 20001541539 in words is "twenty billion, one million, five hundred forty-one thousand, five hundred thirty-nine".