20085774477861 has 8 divisors (see below), whose sum is σ = 26781856722880. Its totient is φ = 13390104275712.

The previous prime is 20085774477833. The next prime is 20085774477871. The reversal of 20085774477861 is 16877447758002.

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

It is not a de Polignac number, because 20085774477861 - 2⁵ = 20085774477829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20085774477792 and 20085774477801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20085774477871) 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, 102896956 + ... + 103091973.

It is an arithmetic number, because the mean of its divisors is an integer number (3347732090360).

Almost surely, 2^{20085774477861} is an apocalyptic number.

It is an amenable number.

20085774477861 is a deficient number, since it is larger than the sum of its proper divisors (6696082245019).

20085774477861 is a wasteful number, since it uses less digits than its factorization.

20085774477861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206021435.

The product of its (nonzero) digits is 147517440, while the sum is 66.

The spelling of 20085774477861 in words is "twenty trillion, eighty-five billion, seven hundred seventy-four million, four hundred seventy-seven thousand, eight hundred sixty-one".