20050993581 has 16 divisors (see below), whose sum is σ = 26920261056. Its totient is φ = 13274706816.

The previous prime is 20050993577. The next prime is 20050993597. The reversal of 20050993581 is 18539905002.

It is not a de Polignac number, because 20050993581 - 2² = 20050993577 is a prime.

It is a super-3 number, since 3×20050993581³ (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 (20050993511) 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 15 ways as a sum of consecutive naturals, for example, 436401 + ... + 480153.

It is an arithmetic number, because the mean of its divisors is an integer number (1682516316).

Almost surely, 2^20050993581 is an apocalyptic number.

It is an amenable number.

20050993581 is a deficient number, since it is larger than the sum of its proper divisors (6869267475).

20050993581 is a wasteful number, since it uses less digits than its factorization.

20050993581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44812.

The product of its (nonzero) digits is 97200, while the sum is 42.

The spelling of 20050993581 in words is "twenty billion, fifty million, nine hundred ninety-three thousand, five hundred eighty-one".