20840886146 has 8 divisors (see below), whose sum is σ = 31391045004. Its totient is φ = 10377204480.

The previous prime is 20840886139. The next prime is 20840886161. The reversal of 20840886146 is 64168804802.

It is a happy number.

20840886146 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20599425625 + 241460521 = 143525^2 + 15539^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20840886146.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21618695 + ... + 21619658.

Almost surely, 2^20840886146 is an apocalyptic number.

20840886146 is a deficient number, since it is larger than the sum of its proper divisors (10550158858).

20840886146 is a wasteful number, since it uses less digits than its factorization.

20840886146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43238596.

The product of its (nonzero) digits is 589824, while the sum is 47.

The spelling of 20840886146 in words is "twenty billion, eight hundred forty million, eight hundred eighty-six thousand, one hundred forty-six".