17900399042 has 8 divisors (see below), whose sum is σ = 26851493196. Its totient is φ = 8949901312.

The previous prime is 17900399029. The next prime is 17900399063. The reversal of 17900399042 is 24099300971.

It can be written as a sum of positive squares in 2 ways, for example, as 10675229041 + 7225170001 = 103321^2 + 85001^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 17900398984 and 17900399002.

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, 64463 + ... + 199890.

Almost surely, 2^17900399042 is an apocalyptic number.

17900399042 is a deficient number, since it is larger than the sum of its proper divisors (8951094154).

17900399042 is a wasteful number, since it uses less digits than its factorization.

17900399042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298212.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 17900399042 in words is "seventeen billion, nine hundred million, three hundred ninety-nine thousand, forty-two".