20206139208 has 64 divisors (see below), whose sum is σ = 54087912000. Its totient is φ = 6267942912.

The previous prime is 20206139207. The next prime is 20206139221. The reversal of 20206139208 is 80293160202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20206139207) 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, 241918 + ... + 314541.

It is an arithmetic number, because the mean of its divisors is an integer number (845123625).

Almost surely, 2^20206139208 is an apocalyptic number.

It is an amenable number.

20206139208 is an abundant number, since it is smaller than the sum of its proper divisors (33881772792).

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

20206139208 is a wasteful number, since it uses less digits than its factorization.

20206139208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556574 (or 556570 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 20206139208 in words is "twenty billion, two hundred six million, one hundred thirty-nine thousand, two hundred eight".