18718390190 has 8 divisors (see below), whose sum is σ = 33693102360. Its totient is φ = 7487356072.

The previous prime is 18718390181. The next prime is 18718390237. The reversal of 18718390190 is 9109381781.

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

It is a super-2 number, since 2×18718390190² (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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 935919500 + ... + 935919519.

It is an arithmetic number, because the mean of its divisors is an integer number (4211637795).

Almost surely, 2^18718390190 is an apocalyptic number.

18718390190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18718390190 is a deficient number, since it is larger than the sum of its proper divisors (14974712170).

18718390190 is a wasteful number, since it uses less digits than its factorization.

18718390190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871839026.

The product of its (nonzero) digits is 108864, while the sum is 47.

The spelling of 18718390190 in words is "eighteen billion, seven hundred eighteen million, three hundred ninety thousand, one hundred ninety".