18218791124 has 24 divisors (see below), whose sum is σ = 32077432800. Its totient is φ = 9053863200.

The previous prime is 18218791121. The next prime is 18218791139. The reversal of 18218791124 is 42119781281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18218791121) 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, 1705199 + ... + 1715849.

It is an arithmetic number, because the mean of its divisors is an integer number (1336559700).

Almost surely, 2^18218791124 is an apocalyptic number.

It is an amenable number.

18218791124 is a deficient number, since it is larger than the sum of its proper divisors (13858641676).

18218791124 is a wasteful number, since it uses less digits than its factorization.

18218791124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13223 (or 13221 counting only the distinct ones).

The product of its digits is 64512, while the sum is 44.

The spelling of 18218791124 in words is "eighteen billion, two hundred eighteen million, seven hundred ninety-one thousand, one hundred twenty-four".