18205000947 has 12 divisors (see below), whose sum is σ = 30052700080. Its totient is φ = 10402857648.

The previous prime is 18205000927. The next prime is 18205000949. The reversal of 18205000947 is 74900050281.

It is not a de Polignac number, because 18205000947 - 2¹⁹ = 18204476659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18205000949) 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 11 ways as a sum of consecutive naturals, for example, 144484072 + ... + 144484197.

Almost surely, 2^18205000947 is an apocalyptic number.

18205000947 is a deficient number, since it is larger than the sum of its proper divisors (11847699133).

18205000947 is a wasteful number, since it uses less digits than its factorization.

18205000947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288968282 (or 288968279 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 18205000947 in words is "eighteen billion, two hundred five million, nine hundred forty-seven", and thus it is an aban number.