18886661043 has 8 divisors (see below), whose sum is σ = 25236139968. Its totient is φ = 12564144744.

The previous prime is 18886661033. The next prime is 18886661047. The reversal of 18886661043 is 34016668881.

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

It is not a de Polignac number, because 18886661043 - 2⁸ = 18886660787 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18886661047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6739021 + ... + 6741822.

It is an arithmetic number, because the mean of its divisors is an integer number (3154517496).

Almost surely, 2^18886661043 is an apocalyptic number.

18886661043 is a deficient number, since it is larger than the sum of its proper divisors (6349478925).

18886661043 is a wasteful number, since it uses less digits than its factorization.

18886661043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13481313.

The product of its (nonzero) digits is 1327104, while the sum is 51.

The spelling of 18886661043 in words is "eighteen billion, eight hundred eighty-six million, six hundred sixty-one thousand, forty-three".