20426348868 has 12 divisors (see below), whose sum is σ = 47661480720. Its totient is φ = 6808782952.

The previous prime is 20426348863. The next prime is 20426348879. The reversal of 20426348868 is 86884362402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20426348868.

It is not an unprimeable number, because it can be changed into a prime (20426348863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851097858 + ... + 851097881.

It is an arithmetic number, because the mean of its divisors is an integer number (3971790060).

Almost surely, 2^20426348868 is an apocalyptic number.

It is an amenable number.

20426348868 is an abundant number, since it is smaller than the sum of its proper divisors (27235131852).

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

20426348868 is a wasteful number, since it uses less digits than its factorization.

20426348868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1702195746 (or 1702195744 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 51.

It can be divided in two parts, 2042634 and 8868, that added together give a palindrome (2051502).

The spelling of 20426348868 in words is "twenty billion, four hundred twenty-six million, three hundred forty-eight thousand, eight hundred sixty-eight".