18105026757412 has 72 divisors (see below), whose sum is σ = 36896337081240. Its totient is φ = 7750948423680.

The previous prime is 18105026757383. The next prime is 18105026757427. The reversal of 18105026757412 is 21475762050181.

It can be written as a sum of positive squares in 4 ways, for example, as 5176644250176 + 12928382507236 = 2275224^2 + 3595606^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 975845128 + ... + 975863680.

Almost surely, 2^{18105026757412} is an apocalyptic number.

It is an amenable number.

18105026757412 is an abundant number, since it is smaller than the sum of its proper divisors (18791310323828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18105026757412 is a wasteful number, since it uses less digits than its factorization.

18105026757412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23661 (or 23652 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 18105026757412 in words is "eighteen trillion, one hundred five billion, twenty-six million, seven hundred fifty-seven thousand, four hundred twelve".