18543611228 has 6 divisors (see below), whose sum is σ = 32451319656. Its totient is φ = 9271805612.

The previous prime is 18543611227. The next prime is 18543611231. The reversal of 18543611228 is 82211634581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18543611227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2317951400 + ... + 2317951407.

It is an arithmetic number, because the mean of its divisors is an integer number (5408553276).

Almost surely, 2^18543611228 is an apocalyptic number.

It is an amenable number.

18543611228 is a deficient number, since it is larger than the sum of its proper divisors (13907708428).

18543611228 is a wasteful number, since it uses less digits than its factorization.

18543611228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635902811 (or 4635902809 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The spelling of 18543611228 in words is "eighteen billion, five hundred forty-three million, six hundred eleven thousand, two hundred twenty-eight".