20381895776 has 48 divisors (see below), whose sum is σ = 44957883600. Its totient is φ = 9014100480.

The previous prime is 20381895773. The next prime is 20381895823. The reversal of 20381895776 is 67759818302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20381895773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 769451 + ... + 795498.

It is an arithmetic number, because the mean of its divisors is an integer number (936622575).

Almost surely, 2^20381895776 is an apocalyptic number.

It is an amenable number.

20381895776 is an abundant number, since it is smaller than the sum of its proper divisors (24575987824).

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

20381895776 is a wasteful number, since it uses less digits than its factorization.

20381895776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565007 (or 1564999 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 20381895776 in words is "twenty billion, three hundred eighty-one million, eight hundred ninety-five thousand, seven hundred seventy-six".