18701891942 has 8 divisors (see below), whose sum is σ = 28083769896. Its totient is φ = 9340635312.

The previous prime is 18701891941. The next prime is 18701891969. The reversal of 18701891942 is 24919810781.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18701891941) by changing a digit.

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, 5153063 + ... + 5156690.

It is an arithmetic number, because the mean of its divisors is an integer number (3510471237).

Almost surely, 2^18701891942 is an apocalyptic number.

18701891942 is a deficient number, since it is larger than the sum of its proper divisors (9381877954).

18701891942 is a wasteful number, since it uses less digits than its factorization.

18701891942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310662.

The product of its (nonzero) digits is 290304, while the sum is 50.

The spelling of 18701891942 in words is "eighteen billion, seven hundred one million, eight hundred ninety-one thousand, nine hundred forty-two".