20173679019 has 32 divisors (see below), whose sum is σ = 32227997760. Its totient is φ = 12398344704.

The previous prime is 20173678999. The next prime is 20173679027. The reversal of 20173679019 is 91097637102.

It is not a de Polignac number, because 20173679019 - 2⁷ = 20173678891 is a prime.

It is a super-2 number, since 2×20173679019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20173679059) 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 31 ways as a sum of consecutive naturals, for example, 234147 + ... + 308499.

It is an arithmetic number, because the mean of its divisors is an integer number (1007124930).

Almost surely, 2^20173679019 is an apocalyptic number.

20173679019 is a deficient number, since it is larger than the sum of its proper divisors (12054318741).

20173679019 is a wasteful number, since it uses less digits than its factorization.

20173679019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75148 (or 75142 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The spelling of 20173679019 in words is "twenty billion, one hundred seventy-three million, six hundred seventy-nine thousand, nineteen".