20366844985 has 16 divisors (see below), whose sum is σ = 25881638400. Its totient is φ = 15332805376.

The previous prime is 20366844923. The next prime is 20366845013. The reversal of 20366844985 is 58944866302.

It is not a de Polignac number, because 20366844985 - 2¹⁵ = 20366812217 is a prime.

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, 787896 + ... + 813334.

It is an arithmetic number, because the mean of its divisors is an integer number (1617602400).

Almost surely, 2^20366844985 is an apocalyptic number.

It is an amenable number.

20366844985 is a deficient number, since it is larger than the sum of its proper divisors (5514793415).

20366844985 is a wasteful number, since it uses less digits than its factorization.

20366844985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34880.

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 20366844985 in words is "twenty billion, three hundred sixty-six million, eight hundred forty-four thousand, nine hundred eighty-five".