18793015747 has 4 divisors (see below), whose sum is σ = 20501471736. Its totient is φ = 17084559760.

The previous prime is 18793015723. The next prime is 18793015757. The reversal of 18793015747 is 74751039781.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18793015747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18793015694 and 18793015703.

It is not an unprimeable number, because it can be changed into a prime (18793015757) 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, 854227978 + ... + 854227999.

It is an arithmetic number, because the mean of its divisors is an integer number (5125367934).

Almost surely, 2^18793015747 is an apocalyptic number.

18793015747 is a deficient number, since it is larger than the sum of its proper divisors (1708455989).

18793015747 is a wasteful number, since it uses less digits than its factorization.

18793015747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708455988.

The product of its (nonzero) digits is 1481760, while the sum is 52.

The spelling of 18793015747 in words is "eighteen billion, seven hundred ninety-three million, fifteen thousand, seven hundred forty-seven".