18780094893 has 32 divisors (see below), whose sum is σ = 30353495040. Its totient is φ = 10089031680.

The previous prime is 18780094867. The next prime is 18780094919. The reversal of 18780094893 is 39849008781.

It is an interprime number because it is at equal distance from previous prime (18780094867) and next prime (18780094919).

It is not a de Polignac number, because 18780094893 - 2⁹ = 18780094381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18780092893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127380 + ... + 231917.

It is an arithmetic number, because the mean of its divisors is an integer number (948546720).

Almost surely, 2^18780094893 is an apocalyptic number.

It is an amenable number.

18780094893 is a deficient number, since it is larger than the sum of its proper divisors (11573400147).

18780094893 is a wasteful number, since it uses less digits than its factorization.

18780094893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359457.

The product of its (nonzero) digits is 3483648, while the sum is 57.

The spelling of 18780094893 in words is "eighteen billion, seven hundred eighty million, ninety-four thousand, eight hundred ninety-three".