18196284788 has 12 divisors (see below), whose sum is σ = 34738361952. Its totient is φ = 8271038520.

The previous prime is 18196284779. The next prime is 18196284793. The reversal of 18196284788 is 88748269181.

It is a super-2 number, since 2×18196284788² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18196284788.

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, 206775920 + ... + 206776007.

It is an arithmetic number, because the mean of its divisors is an integer number (2894863496).

Almost surely, 2^18196284788 is an apocalyptic number.

It is an amenable number.

18196284788 is a deficient number, since it is larger than the sum of its proper divisors (16542077164).

18196284788 is a wasteful number, since it uses less digits than its factorization.

18196284788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413551942 (or 413551940 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 62.

The spelling of 18196284788 in words is "eighteen billion, one hundred ninety-six million, two hundred eighty-four thousand, seven hundred eighty-eight".