20852813673645 has 16 divisors (see below), whose sum is σ = 33786837346560. Its totient is φ = 10980722136384.

The previous prime is 20852813673617. The next prime is 20852813673683. The reversal of 20852813673645 is 54637631825802.

It is not a de Polignac number, because 20852813673645 - 2³² = 20848518706349 is a prime.

It is a super-3 number, since 3×20852813673645³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8798654374 + ... + 8798656743.

It is an arithmetic number, because the mean of its divisors is an integer number (2111677334160).

Almost surely, 2^{20852813673645} is an apocalyptic number.

It is an amenable number.

20852813673645 is a deficient number, since it is larger than the sum of its proper divisors (12934023672915).

20852813673645 is a wasteful number, since it uses less digits than its factorization.

20852813673645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17597311204.

The product of its (nonzero) digits is 58060800, while the sum is 60.

The spelling of 20852813673645 in words is "twenty trillion, eight hundred fifty-two billion, eight hundred thirteen million, six hundred seventy-three thousand, six hundred forty-five".