20173998039 has 32 divisors (see below), whose sum is σ = 30727408320. Its totient is φ = 11663296512.

The previous prime is 20173998037. The next prime is 20173998101. The reversal of 20173998039 is 93089937102.

It is a happy number.

It is not a de Polignac number, because 20173998039 - 2¹ = 20173998037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 20173997982 and 20173998000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20173998037) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 341977 + ... + 396605.

It is an arithmetic number, because the mean of its divisors is an integer number (960231510).

Almost surely, 2^20173998039 is an apocalyptic number.

20173998039 is a deficient number, since it is larger than the sum of its proper divisors (10553410281).

20173998039 is a wasteful number, since it uses less digits than its factorization.

20173998039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55219.

The product of its (nonzero) digits is 734832, while the sum is 51.

The spelling of 20173998039 in words is "twenty billion, one hundred seventy-three million, nine hundred ninety-eight thousand, thirty-nine".