18145047868 has 12 divisors (see below), whose sum is σ = 31825515960. Its totient is φ = 9052043312.

The previous prime is 18145047847. The next prime is 18145047871. The reversal of 18145047868 is 86874054181.

It is a super-2 number, since 2×18145047868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5118163 + ... + 5121706.

It is an arithmetic number, because the mean of its divisors is an integer number (2652126330).

Almost surely, 2^18145047868 is an apocalyptic number.

It is an amenable number.

18145047868 is a deficient number, since it is larger than the sum of its proper divisors (13680468092).

18145047868 is a wasteful number, since it uses less digits than its factorization.

18145047868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240316 (or 10240314 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 52.

The spelling of 18145047868 in words is "eighteen billion, one hundred forty-five million, forty-seven thousand, eight hundred sixty-eight".