20204535541 has 24 divisors (see below), whose sum is σ = 21844650240. Its totient is φ = 18666542400.

The previous prime is 20204535529. The next prime is 20204535551. The reversal of 20204535541 is 14553540202.

It is a de Polignac number, because none of the positive numbers 2^k-20204535541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20204535551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12478830 + ... + 12480448.

It is an arithmetic number, because the mean of its divisors is an integer number (910193760).

Almost surely, 2^20204535541 is an apocalyptic number.

It is an amenable number.

20204535541 is a deficient number, since it is larger than the sum of its proper divisors (1640114699).

20204535541 is a wasteful number, since it uses less digits than its factorization.

20204535541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457 (or 2434 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 20204535541 in words is "twenty billion, two hundred four million, five hundred thirty-five thousand, five hundred forty-one".