18871905886 has 8 divisors (see below), whose sum is σ = 28308445560. Its totient is φ = 9435757368.

The previous prime is 18871905883. The next prime is 18871905893. The reversal of 18871905886 is 68850917881.

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

It is a super-2 number, since 2×18871905886² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18871905883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118560 + ... + 227596.

It is an arithmetic number, because the mean of its divisors is an integer number (3538555695).

Almost surely, 2^18871905886 is an apocalyptic number.

18871905886 is a deficient number, since it is larger than the sum of its proper divisors (9436539674).

18871905886 is a wasteful number, since it uses less digits than its factorization.

18871905886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195578.

The product of its (nonzero) digits is 7741440, while the sum is 61.

The spelling of 18871905886 in words is "eighteen billion, eight hundred seventy-one million, nine hundred five thousand, eight hundred eighty-six".