20773205135539 has 64 divisors (see below), whose sum is σ = 24245250048000. Its totient is φ = 17666365317120.

The previous prime is 20773205135513. The next prime is 20773205135567. The reversal of 20773205135539 is 93553150237702.

It is a cyclic number.

It is not a de Polignac number, because 20773205135539 - 2⁷ = 20773205135411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20773205135239) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 450071287 + ... + 450117439.

It is an arithmetic number, because the mean of its divisors is an integer number (378832032000).

Almost surely, 2^{20773205135539} is an apocalyptic number.

20773205135539 is a deficient number, since it is larger than the sum of its proper divisors (3472044912461).

20773205135539 is a wasteful number, since it uses less digits than its factorization.

20773205135539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46868.

The product of its (nonzero) digits is 5953500, while the sum is 52.

The spelling of 20773205135539 in words is "twenty trillion, seven hundred seventy-three billion, two hundred five million, one hundred thirty-five thousand, five hundred thirty-nine".