1838388218620 has 12 divisors (see below), whose sum is σ = 3860615259144. Its totient is φ = 735355287440.

The previous prime is 1838388218617. The next prime is 1838388218669. The reversal of 1838388218620 is 268128838381.

It is a super-3 number, since 3×1838388218620³ (a number of 38 digits) contains 333 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 3 ways as a sum of consecutive naturals, for example, 45959705446 + ... + 45959705485.

It is an arithmetic number, because the mean of its divisors is an integer number (321717938262).

Almost surely, 2^{1838388218620} is an apocalyptic number.

1838388218620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838388218620 is an abundant number, since it is smaller than the sum of its proper divisors (2022227040524).

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

1838388218620 is a wasteful number, since it uses less digits than its factorization.

1838388218620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91919410940 (or 91919410938 counting only the distinct ones).

The product of its (nonzero) digits is 7077888, while the sum is 58.

The spelling of 1838388218620 in words is "one trillion, eight hundred thirty-eight billion, three hundred eighty-eight million, two hundred eighteen thousand, six hundred twenty".