18345733747 has 4 divisors (see below), whose sum is σ = 20013527736. Its totient is φ = 16677939760.

The previous prime is 18345733711. The next prime is 18345733781. The reversal of 18345733747 is 74733754381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18345733747 - 2³¹ = 16198250099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18345733694 and 18345733703.

It is not an unprimeable number, because it can be changed into a prime (18345737747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833896978 + ... + 833896999.

It is an arithmetic number, because the mean of its divisors is an integer number (5003381934).

Almost surely, 2^18345733747 is an apocalyptic number.

18345733747 is a deficient number, since it is larger than the sum of its proper divisors (1667793989).

18345733747 is a wasteful number, since it uses less digits than its factorization.

18345733747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667793988.

The product of its digits is 5927040, while the sum is 52.

The spelling of 18345733747 in words is "eighteen billion, three hundred forty-five million, seven hundred thirty-three thousand, seven hundred forty-seven".