18815081146 has 8 divisors (see below), whose sum is σ = 28247756544. Its totient is φ = 9399162300.

The previous prime is 18815081141. The next prime is 18815081147. The reversal of 18815081146 is 64118051881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (18815081141) 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, 4186330 + ... + 4190821.

It is an arithmetic number, because the mean of its divisors is an integer number (3530969568).

Almost surely, 2^18815081146 is an apocalyptic number.

18815081146 is a deficient number, since it is larger than the sum of its proper divisors (9432675398).

18815081146 is a wasteful number, since it uses less digits than its factorization.

18815081146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8378276.

The product of its (nonzero) digits is 61440, while the sum is 43.

The spelling of 18815081146 in words is "eighteen billion, eight hundred fifteen million, eighty-one thousand, one hundred forty-six".