20365973776 has 40 divisors (see below), whose sum is σ = 40816070144. Its totient is φ = 9834151680.

The previous prime is 20365973773. The next prime is 20365973801. The reversal of 20365973776 is 67737956302.

It is not an unprimeable number, because it can be changed into a prime (20365973773) 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, 199396 + ... + 283708.

Almost surely, 2^20365973776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20365973776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20408035072).

20365973776 is an abundant number, since it is smaller than the sum of its proper divisors (20450096368).

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

20365973776 is a wasteful number, since it uses less digits than its factorization.

20365973776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84839 (or 84833 counting only the distinct ones).

The product of its (nonzero) digits is 10001880, while the sum is 55.

The spelling of 20365973776 in words is "twenty billion, three hundred sixty-five million, nine hundred seventy-three thousand, seven hundred seventy-six".