20311210108 has 48 divisors (see below), whose sum is σ = 41524907200. Its totient is φ = 8689379328.

The previous prime is 20311210099. The next prime is 20311210109. The reversal of 20311210108 is 80101211302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311210109) 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, 778816 + ... + 804472.

Almost surely, 2^20311210108 is an apocalyptic number.

20311210108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20311210108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20762453600).

20311210108 is an abundant number, since it is smaller than the sum of its proper divisors (21213697092).

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

20311210108 is a wasteful number, since it uses less digits than its factorization.

20311210108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26259 (or 26243 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

The spelling of 20311210108 in words is "twenty billion, three hundred eleven million, two hundred ten thousand, one hundred eight".