20018278679 has 16 divisors (see below), whose sum is σ = 23342819136. Its totient is φ = 16813440000.

The previous prime is 20018278673. The next prime is 20018278711. The reversal of 20018278679 is 97687281002.

It is a de Polignac number, because none of the positive numbers 2^k-20018278679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018278673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77372 + ... + 214529.

It is an arithmetic number, because the mean of its divisors is an integer number (1458926196).

Almost surely, 2^20018278679 is an apocalyptic number.

20018278679 is a deficient number, since it is larger than the sum of its proper divisors (3324540457).

20018278679 is a wasteful number, since it uses less digits than its factorization.

20018278679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292106.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 20018278679 in words is "twenty billion, eighteen million, two hundred seventy-eight thousand, six hundred seventy-nine".