18393913453 has 8 divisors (see below), whose sum is σ = 19481818680. Its totient is φ = 17306664960.

The previous prime is 18393913451. The next prime is 18393913469. The reversal of 18393913453 is 35431939381.

It can be written as a sum of positive squares in 4 ways, for example, as 10534559044 + 7859354409 = 102638^2 + 88653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18393913453 - 2¹ = 18393913451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18393913397 and 18393913406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18393913451) 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, 105918 + ... + 219103.

It is an arithmetic number, because the mean of its divisors is an integer number (2435227335).

Almost surely, 2^18393913453 is an apocalyptic number.

It is an amenable number.

18393913453 is a deficient number, since it is larger than the sum of its proper divisors (1087905227).

18393913453 is a wasteful number, since it uses less digits than its factorization.

18393913453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328367.

The product of its digits is 1049760, while the sum is 49.

The spelling of 18393913453 in words is "eighteen billion, three hundred ninety-three million, nine hundred thirteen thousand, four hundred fifty-three".