20085774477860 has 96 divisors (see below), whose sum is σ = 51925959187200. Its totient is φ = 6355352360448.

The previous prime is 20085774477833. The next prime is 20085774477871. The reversal of 20085774477860 is 6877447758002.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6646367 + ... + 9183993.

It is an arithmetic number, because the mean of its divisors is an integer number (540895408200).

Almost surely, 2^{20085774477860} is an apocalyptic number.

20085774477860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20085774477860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25962979593600).

20085774477860 is an abundant number, since it is smaller than the sum of its proper divisors (31840184709340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20085774477860 is a wasteful number, since it uses less digits than its factorization.

20085774477860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2542005 (or 2542003 counting only the distinct ones).

The product of its (nonzero) digits is 147517440, while the sum is 65.

The spelling of 20085774477860 in words is "twenty trillion, eighty-five billion, seven hundred seventy-four million, four hundred seventy-seven thousand, eight hundred sixty".