18843813497 has 8 divisors (see below), whose sum is σ = 19665427776. Its totient is φ = 18022392432.

The previous prime is 18843813493. The next prime is 18843813529. The reversal of 18843813497 is 79431834881.

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 18843813497 - 2² = 18843813493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18843813493) 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, 172538 + ... + 259724.

It is an arithmetic number, because the mean of its divisors is an integer number (2458178472).

Almost surely, 2^18843813497 is an apocalyptic number.

It is an amenable number.

18843813497 is a deficient number, since it is larger than the sum of its proper divisors (821614279).

18843813497 is an equidigital number, since it uses as much as digits as its factorization.

18843813497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96607.

The product of its digits is 4644864, while the sum is 56.

The spelling of 18843813497 in words is "eighteen billion, eight hundred forty-three million, eight hundred thirteen thousand, four hundred ninety-seven".