20581189336 has 32 divisors (see below), whose sum is σ = 40425768000. Its totient is φ = 9809968896.

The previous prime is 20581189333. The next prime is 20581189351. The reversal of 20581189336 is 63398118502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20581189333) 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, 543141 + ... + 579796.

It is an arithmetic number, because the mean of its divisors is an integer number (1263305250).

Almost surely, 2^20581189336 is an apocalyptic number.

It is an amenable number.

20581189336 is a deficient number, since it is larger than the sum of its proper divisors (19844578664).

20581189336 is a wasteful number, since it uses less digits than its factorization.

20581189336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123051 (or 1123047 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 20581189336 in words is "twenty billion, five hundred eighty-one million, one hundred eighty-nine thousand, three hundred thirty-six".