18223936500238 has 16 divisors (see below), whose sum is σ = 31487026397184. Its totient is φ = 7748760400920.

The previous prime is 18223936500227. The next prime is 18223936500251. The reversal of 18223936500238 is 83200563932281.

It is a happy number.

It is a super-2 number, since 2×18223936500238² (a number of 27 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5124839758 + ... + 5124843313.

It is an arithmetic number, because the mean of its divisors is an integer number (1967939149824).

Almost surely, 2^{18223936500238} is an apocalyptic number.

18223936500238 is a deficient number, since it is larger than the sum of its proper divisors (13263089896946).

18223936500238 is a wasteful number, since it uses less digits than its factorization.

18223936500238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10249683207.

The product of its (nonzero) digits is 3732480, while the sum is 52.

The spelling of 18223936500238 in words is "eighteen trillion, two hundred twenty-three billion, nine hundred thirty-six million, five hundred thousand, two hundred thirty-eight".