18843612463 has 8 divisors (see below), whose sum is σ = 21361180400. Its totient is φ = 16478624448.

The previous prime is 18843612457. The next prime is 18843612467. The reversal of 18843612463 is 36421634881.

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

It is not a de Polignac number, because 18843612463 - 2²¹ = 18841515311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18843612467) 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, 38144718 + ... + 38145211.

It is an arithmetic number, because the mean of its divisors is an integer number (2670147550).

Almost surely, 2^18843612463 is an apocalyptic number.

18843612463 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

18843612463 is a deficient number, since it is larger than the sum of its proper divisors (2517567937).

18843612463 is a wasteful number, since it uses less digits than its factorization.

18843612463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76289961.

The product of its digits is 663552, while the sum is 46.

The spelling of 18843612463 in words is "eighteen billion, eight hundred forty-three million, six hundred twelve thousand, four hundred sixty-three".