18743172918906 has 16 divisors (see below), whose sum is σ = 37559992888800. Its totient is φ = 6235449797808.

The previous prime is 18743172918901. The next prime is 18743172918919. The reversal of 18743172918906 is 60981927134781.

It is a super-2 number, since 2×18743172918906² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18743172918901) 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, 3068623816 + ... + 3068629923.

It is an arithmetic number, because the mean of its divisors is an integer number (2347499555550).

Almost surely, 2^{18743172918906} is an apocalyptic number.

18743172918906 is an abundant number, since it is smaller than the sum of its proper divisors (18816819969894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18743172918906 is a wasteful number, since it uses less digits than its factorization.

18743172918906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6137254253.

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 18743172918906 in words is "eighteen trillion, seven hundred forty-three billion, one hundred seventy-two million, nine hundred eighteen thousand, nine hundred six".