18871395934 has 8 divisors (see below), whose sum is σ = 28312757928. Its totient is φ = 9433809960.

The previous prime is 18871395923. The next prime is 18871395941. The reversal of 18871395934 is 43959317881.

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

It is a super-2 number, since 2×18871395934² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 931477 + ... + 951520.

It is an arithmetic number, because the mean of its divisors is an integer number (3539094741).

Almost surely, 2^18871395934 is an apocalyptic number.

18871395934 is a deficient number, since it is larger than the sum of its proper divisors (9441361994).

18871395934 is a wasteful number, since it uses less digits than its factorization.

18871395934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888010.

The product of its digits is 6531840, while the sum is 58.

The spelling of 18871395934 in words is "eighteen billion, eight hundred seventy-one million, three hundred ninety-five thousand, nine hundred thirty-four".