20078239183 has 16 divisors (see below), whose sum is σ = 21210808320. Its totient is φ = 18968298624.

The previous prime is 20078239163. The next prime is 20078239187. The reversal of 20078239183 is 38193287002.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20078239183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078239187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 896263 + ... + 918391.

It is an arithmetic number, because the mean of its divisors is an integer number (1325675520).

Almost surely, 2^20078239183 is an apocalyptic number.

20078239183 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20078239183 is a deficient number, since it is larger than the sum of its proper divisors (1132569137).

20078239183 is a wasteful number, since it uses less digits than its factorization.

20078239183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22638.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 20078239183 in words is "twenty billion, seventy-eight million, two hundred thirty-nine thousand, one hundred eighty-three".