18851322143 has 8 divisors (see below), whose sum is σ = 19003342176. Its totient is φ = 18699660000.

The previous prime is 18851322121. The next prime is 18851322173. The reversal of 18851322143 is 34122315881.

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

It is a cyclic number.

It is not a de Polignac number, because 18851322143 - 2⁸ = 18851321887 is a prime.

It is a super-2 number, since 2×18851322143² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18851322097 and 18851322106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18851322103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16805 + ... + 194897.

It is an arithmetic number, because the mean of its divisors is an integer number (2375417772).

Almost surely, 2^18851322143 is an apocalyptic number.

18851322143 is a deficient number, since it is larger than the sum of its proper divisors (152020033).

18851322143 is a wasteful number, since it uses less digits than its factorization.

18851322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178945.

The product of its digits is 46080, while the sum is 38.

The spelling of 18851322143 in words is "eighteen billion, eight hundred fifty-one million, three hundred twenty-two thousand, one hundred forty-three".