1819953494118 has 24 divisors (see below), whose sum is σ = 3943299461400. Its totient is φ = 606640873824.

The previous prime is 1819953494087. The next prime is 1819953494119. The reversal of 1819953494118 is 8114943599181.

1819953494118 is a `hidden beast` number, since 1 + 8 + 1 + 9 + 9 + 534 + 94 + 1 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819953494119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 273313 + ... + 1927331.

It is an arithmetic number, because the mean of its divisors is an integer number (164304144225).

Almost surely, 2^{1819953494118} is an apocalyptic number.

1819953494118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1819953494118 is an abundant number, since it is smaller than the sum of its proper divisors (2123345967282).

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

1819953494118 is a wasteful number, since it uses less digits than its factorization.

1819953494118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715156 (or 1715153 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The spelling of 1819953494118 in words is "one trillion, eight hundred nineteen billion, nine hundred fifty-three million, four hundred ninety-four thousand, one hundred eighteen".