20705507282861 has 8 divisors (see below), whose sum is σ = 21003366115200. Its totient is φ = 20408800709952.

The previous prime is 20705507282827. The next prime is 20705507282921. The reversal of 20705507282861 is 16828270550702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20705507282861 - 2⁶ = 20705507282797 is a prime.

It is a super-2 number, since 2×20705507282861² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20705507282821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288028661 + ... + 288100538.

It is an arithmetic number, because the mean of its divisors is an integer number (2625420764400).

Almost surely, 2^{20705507282861} is an apocalyptic number.

It is an amenable number.

20705507282861 is a deficient number, since it is larger than the sum of its proper divisors (297858832339).

20705507282861 is an equidigital number, since it uses as much as digits as its factorization.

20705507282861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576129715.

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 20705507282861 in words is "twenty trillion, seven hundred five billion, five hundred seven million, two hundred eighty-two thousand, eight hundred sixty-one".