20573705671839 has 20 divisors (see below), whose sum is σ = 30741069630216. Its totient is φ = 13712452520976.

The previous prime is 20573705671789. The next prime is 20573705671873. The reversal of 20573705671839 is 93817650737502.

20573705671839 is a `hidden beast` number, since 2 + 0 + 5 + 7 + 37 + 0 + 567 + 1 + 8 + 39 = 666.

It is not a de Polignac number, because 20573705671839 - 2²⁴ = 20573688894623 is a prime.

It is a super-3 number, since 3×20573705671839³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20573705671879) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30696609 + ... + 31359674.

Almost surely, 2^{20573705671839} is an apocalyptic number.

20573705671839 is a deficient number, since it is larger than the sum of its proper divisors (10167363958377).

20573705671839 is an equidigital number, since it uses as much as digits as its factorization.

20573705671839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62060388 (or 62060379 counting only the distinct ones).

The product of its (nonzero) digits is 66679200, while the sum is 63.

The spelling of 20573705671839 in words is "twenty trillion, five hundred seventy-three billion, seven hundred five million, six hundred seventy-one thousand, eight hundred thirty-nine".