18673426778820 has 96 divisors (see below), whose sum is σ = 57094698600576. Its totient is φ = 4522457395200.

The previous prime is 18673426778819. The next prime is 18673426778869. The reversal of 18673426778820 is 2887762437681.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13181709 + ... + 14529428.

It is an arithmetic number, because the mean of its divisors is an integer number (594736443756).

Almost surely, 2^{18673426778820} is an apocalyptic number.

18673426778820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18673426778820 is an abundant number, since it is smaller than the sum of its proper divisors (38421271821756).

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

18673426778820 is a wasteful number, since it uses less digits than its factorization.

18673426778820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27712181 (or 27712179 counting only the distinct ones).

The product of its (nonzero) digits is 303464448, while the sum is 69.

The spelling of 18673426778820 in words is "eighteen trillion, six hundred seventy-three billion, four hundred twenty-six million, seven hundred seventy-eight thousand, eight hundred twenty".