20308106138 has 16 divisors (see below), whose sum is σ = 32529116160. Its totient is φ = 9487657200.

The previous prime is 20308106111. The next prime is 20308106173. The reversal of 20308106138 is 83160180302.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5645618 + ... + 5649213.

It is an arithmetic number, because the mean of its divisors is an integer number (2033069760).

Almost surely, 2^20308106138 is an apocalyptic number.

20308106138 is a deficient number, since it is larger than the sum of its proper divisors (12221010022).

20308106138 is a wasteful number, since it uses less digits than its factorization.

20308106138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11294893.

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 20308106138 in words is "twenty billion, three hundred eight million, one hundred six thousand, one hundred thirty-eight".