20541545838 has 64 divisors (see below), whose sum is σ = 49822755840. Its totient is φ = 6221577600.

The previous prime is 20541545809. The next prime is 20541545863. The reversal of 20541545838 is 83854514502.

20541545838 is a `hidden beast` number, since 2 + 0 + 54 + 15 + 4 + 583 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20541545793 and 20541545802.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1350918 + ... + 1366038.

It is an arithmetic number, because the mean of its divisors is an integer number (778480560).

Almost surely, 2^20541545838 is an apocalyptic number.

20541545838 is an abundant number, since it is smaller than the sum of its proper divisors (29281210002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20541545838 is a wasteful number, since it uses less digits than its factorization.

20541545838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17430 (or 17424 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 20541545838 in words is "twenty billion, five hundred forty-one million, five hundred forty-five thousand, eight hundred thirty-eight".