18534913297 has 4 divisors (see below), whose sum is σ = 18540214000. Its totient is φ = 18529612596.

The previous prime is 18534913277. The next prime is 18534913303. The reversal of 18534913297 is 79231943581.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18534913297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18534913207) 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, 2645103 + ... + 2652100.

It is an arithmetic number, because the mean of its divisors is an integer number (4635053500).

Almost surely, 2^18534913297 is an apocalyptic number.

It is an amenable number.

18534913297 is a deficient number, since it is larger than the sum of its proper divisors (5300703).

18534913297 is an equidigital number, since it uses as much as digits as its factorization.

18534913297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5300702.

The product of its digits is 1632960, while the sum is 52.

The spelling of 18534913297 in words is "eighteen billion, five hundred thirty-four million, nine hundred thirteen thousand, two hundred ninety-seven".