20308106136 has 32 divisors (see below), whose sum is σ = 50816781360. Its totient is φ = 6763166592.

The previous prime is 20308106111. The next prime is 20308106173. The reversal of 20308106136 is 63160180302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360855 + ... + 413318.

Almost surely, 2^20308106136 is an apocalyptic number.

It is an amenable number.

20308106136 is an abundant number, since it is smaller than the sum of its proper divisors (30508675224).

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

20308106136 is a wasteful number, since it uses less digits than its factorization.

20308106136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775275 (or 775271 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 20308106136 its reverse (63160180302), we get a palindrome (83468286438).

The spelling of 20308106136 in words is "twenty billion, three hundred eight million, one hundred six thousand, one hundred thirty-six".