1838365638220 has 24 divisors (see below), whose sum is σ = 3860597160000. Its totient is φ = 735340670592.

The previous prime is 1838365638209. The next prime is 1838365638233. The reversal of 1838365638220 is 228365638381.

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, 3260781 + ... + 3782779.

It is an arithmetic number, because the mean of its divisors is an integer number (160858215000).

Almost surely, 2^{1838365638220} is an apocalyptic number.

1838365638220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1838365638220 is an abundant number, since it is smaller than the sum of its proper divisors (2022231521780).

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

1838365638220 is a wasteful number, since it uses less digits than its factorization.

1838365638220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698097 (or 698095 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 55.

The spelling of 1838365638220 in words is "one trillion, eight hundred thirty-eight billion, three hundred sixty-five million, six hundred thirty-eight thousand, two hundred twenty".