20117648826 has 48 divisors (see below), whose sum is σ = 47561286240. Its totient is φ = 6094913760.

The previous prime is 20117648779. The next prime is 20117648827. The reversal of 20117648826 is 62884671102.

It is not an unprimeable number, because it can be changed into a prime (20117648827) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1243920 + ... + 1259988.

It is an arithmetic number, because the mean of its divisors is an integer number (990860130).

Almost surely, 2^20117648826 is an apocalyptic number.

20117648826 is an abundant number, since it is smaller than the sum of its proper divisors (27443637414).

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

20117648826 is a wasteful number, since it uses less digits than its factorization.

20117648826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22411 (or 22408 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 20117648826 in words is "twenty billion, one hundred seventeen million, six hundred forty-eight thousand, eight hundred twenty-six".