20089466781 has 16 divisors (see below), whose sum is σ = 27230280960. Its totient is φ = 13170899520.

The previous prime is 20089466777. The next prime is 20089466791. The reversal of 20089466781 is 18766498002.

It is not a de Polignac number, because 20089466781 - 2² = 20089466777 is a prime.

It is a super-3 number, since 3×20089466781³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20089466731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1775500 + ... + 1786778.

It is an arithmetic number, because the mean of its divisors is an integer number (1701892560).

Almost surely, 2^20089466781 is an apocalyptic number.

It is an amenable number.

20089466781 is a deficient number, since it is larger than the sum of its proper divisors (7140814179).

20089466781 is a wasteful number, since it uses less digits than its factorization.

20089466781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21076.

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 20089466781 in words is "twenty billion, eighty-nine million, four hundred sixty-six thousand, seven hundred eighty-one".