18987426119 has 8 divisors (see below), whose sum is σ = 19363936032. Its totient is φ = 18611592480.

The previous prime is 18987426091. The next prime is 18987426121. The reversal of 18987426119 is 91162478981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18987426119 is a prime.

It is a super-3 number, since 3×18987426119³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18987426149) 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, 112172 + ... + 224849.

It is an arithmetic number, because the mean of its divisors is an integer number (2420492004).

Almost surely, 2^18987426119 is an apocalyptic number.

18987426119 is a deficient number, since it is larger than the sum of its proper divisors (376509913).

18987426119 is a wasteful number, since it uses less digits than its factorization.

18987426119 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338137.

The product of its digits is 1741824, while the sum is 56.

The spelling of 18987426119 in words is "eighteen billion, nine hundred eighty-seven million, four hundred twenty-six thousand, one hundred nineteen".