18650657947 has 8 divisors (see below), whose sum is σ = 18836060256. Its totient is φ = 18465339072.

The previous prime is 18650657939. The next prime is 18650657957. The reversal of 18650657947 is 74975605681.

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

It is a cyclic number.

It is not a de Polignac number, because 18650657947 - 2³ = 18650657939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18650657891 and 18650657900.

It is not an unprimeable number, because it can be changed into a prime (18650657917) 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 7 ways as a sum of consecutive naturals, for example, 490173 + ... + 526849.

It is an arithmetic number, because the mean of its divisors is an integer number (2354507532).

Almost surely, 2^18650657947 is an apocalyptic number.

18650657947 is a deficient number, since it is larger than the sum of its proper divisors (185402309).

18650657947 is a wasteful number, since it uses less digits than its factorization.

18650657947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41717.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 18650657947 in words is "eighteen billion, six hundred fifty million, six hundred fifty-seven thousand, nine hundred forty-seven".