18947987040704 has 28 divisors (see below), whose sum is σ = 37895974097664. Its totient is φ = 9399395142144.

The previous prime is 18947987040701. The next prime is 18947987040817. The reversal of 18947987040704 is 40704078974981.

18947987040704 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18947987040701) by changing a digit.

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, 1165591469 + ... + 1165607724.

Almost surely, 2^{18947987040704} is an apocalyptic number.

It is an amenable number.

18947987040704 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18947987040704 is a wasteful number, since it uses less digits than its factorization.

18947987040704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2331199332 (or 2331199322 counting only the distinct ones).

The product of its (nonzero) digits is 113799168, while the sum is 68.

The spelling of 18947987040704 in words is "eighteen trillion, nine hundred forty-seven billion, nine hundred eighty-seven million, forty thousand, seven hundred four".