18946181069 has 8 divisors (see below), whose sum is σ = 19790827200. Its totient is φ = 18103276576.

The previous prime is 18946181041. The next prime is 18946181099. The reversal of 18946181069 is 96018164981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18946181069 is a prime.

It is a super-2 number, since 2×18946181069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18946181069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18946181099) 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, 413144 + ... + 456705.

It is an arithmetic number, because the mean of its divisors is an integer number (2473853400).

Almost surely, 2^18946181069 is an apocalyptic number.

It is an amenable number.

18946181069 is a deficient number, since it is larger than the sum of its proper divisors (844646131).

18946181069 is an equidigital number, since it uses as much as digits as its factorization.

18946181069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870819.

The product of its (nonzero) digits is 746496, while the sum is 53.

The spelling of 18946181069 in words is "eighteen billion, nine hundred forty-six million, one hundred eighty-one thousand, sixty-nine".