18701360793049 has 9 divisors (see below), whose sum is σ = 20556093489631. Its totient is φ = 17001193839520.

The previous prime is 18701360793047. The next prime is 18701360793109. The reversal of 18701360793049 is 94039706310781.

The square root of 18701360793049 is 4324507.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6502882505625 + 12198478287424 = 2550075^2 + 3492632^2 .

It is not a de Polignac number, because 18701360793049 - 2¹ = 18701360793047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18701360792984 and 18701360793002.

It is not an unprimeable number, because it can be changed into a prime (18701360793047) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47373009 + ... + 47766145.

Almost surely, 2^{18701360793049} is an apocalyptic number.

18701360793049 is the 4324507-th square number.

18701360793049 is the 2162254-th centered octagonal number.

It is an amenable number.

18701360793049 is a deficient number, since it is larger than the sum of its proper divisors (1854732696582).

18701360793049 is an frugal number, since it uses more digits than its factorization.

18701360793049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786296 (or 393148 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 58.

The spelling of 18701360793049 in words is "eighteen trillion, seven hundred one billion, three hundred sixty million, seven hundred ninety-three thousand, forty-nine".