18947681898075 has 288 divisors, whose sum is σ = 41199126033600. Its totient is φ = 8511092029440.

The previous prime is 18947681898043. The next prime is 18947681898113. The reversal of 18947681898075 is 57089818674981.

It is not a de Polignac number, because 18947681898075 - 2⁵ = 18947681898043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18947681897985 and 18947681898003.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 649479189 + ... + 649508361.

It is an arithmetic number, because the mean of its divisors is an integer number (143052520950).

Almost surely, 2^{18947681898075} is an apocalyptic number.

18947681898075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18947681898075 is an abundant number, since it is smaller than the sum of its proper divisors (22251444135525).

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

18947681898075 is a wasteful number, since it uses less digits than its factorization.

18947681898075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29548 (or 29530 counting only the distinct ones).

The product of its (nonzero) digits is 1950842880, while the sum is 81.

The spelling of 18947681898075 in words is "eighteen trillion, nine hundred forty-seven billion, six hundred eighty-one million, eight hundred ninety-eight thousand, seventy-five".