18351685001850 has 48 divisors (see below), whose sum is σ = 46088282363520. Its totient is φ = 4831836048000.

The previous prime is 18351685001849. The next prime is 18351685001927. The reversal of 18351685001850 is 5810058615381.

It is a junction number, because it is equal to n+sod(n) for n = 18351685001793 and 18351685001802.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 774320851 + ... + 774344550.

It is an arithmetic number, because the mean of its divisors is an integer number (960172549240).

Almost surely, 2^{18351685001850} is an apocalyptic number.

18351685001850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18351685001850 is an abundant number, since it is smaller than the sum of its proper divisors (27736597361670).

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

18351685001850 is a wasteful number, since it uses less digits than its factorization.

18351685001850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1548665495 (or 1548665490 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 51.

The spelling of 18351685001850 in words is "eighteen trillion, three hundred fifty-one billion, six hundred eighty-five million, one thousand, eight hundred fifty".