18153544243 has 8 divisors (see below), whose sum is σ = 19152531200. Its totient is φ = 17158911048.

The previous prime is 18153544219. The next prime is 18153544261. The reversal of 18153544243 is 34244535181.

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 18153544243 - 2⁹ = 18153543731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18153544196 and 18153544205.

It is not an unprimeable number, because it can be changed into a prime (18153544043) 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, 1079871 + ... + 1096552.

It is an arithmetic number, because the mean of its divisors is an integer number (2394066400).

Almost surely, 2^18153544243 is an apocalyptic number.

18153544243 is a deficient number, since it is larger than the sum of its proper divisors (998986957).

18153544243 is a wasteful number, since it uses less digits than its factorization.

18153544243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176881.

The product of its digits is 230400, while the sum is 40.

The spelling of 18153544243 in words is "eighteen billion, one hundred fifty-three million, five hundred forty-four thousand, two hundred forty-three".