20545540311 has 16 divisors (see below), whose sum is σ = 27524016000. Its totient is φ = 13632199968.

The previous prime is 20545540289. The next prime is 20545540321. The reversal of 20545540311 is 11304554502.

It is a de Polignac number, because none of the positive numbers 2^k-20545540311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545540321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 526140 + ... + 563838.

It is an arithmetic number, because the mean of its divisors is an integer number (1720251000).

Almost surely, 2^20545540311 is an apocalyptic number.

20545540311 is a deficient number, since it is larger than the sum of its proper divisors (6978475689).

20545540311 is a wasteful number, since it uses less digits than its factorization.

20545540311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38558.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 20545540311 in words is "twenty billion, five hundred forty-five million, five hundred forty thousand, three hundred eleven".