18538247463 has 8 divisors (see below), whose sum is σ = 24843134448. Its totient is φ = 12296096064.

The previous prime is 18538247461. The next prime is 18538247489. The reversal of 18538247463 is 36474283581.

It is a happy number.

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

It is not a de Polignac number, because 18538247463 - 2¹ = 18538247461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18538247461) 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, 15683206 + ... + 15684387.

It is an arithmetic number, because the mean of its divisors is an integer number (3105391806).

Almost surely, 2^18538247463 is an apocalyptic number.

18538247463 is a deficient number, since it is larger than the sum of its proper divisors (6304886985).

18538247463 is a wasteful number, since it uses less digits than its factorization.

18538247463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31367793.

The product of its digits is 3870720, while the sum is 51.

The spelling of 18538247463 in words is "eighteen billion, five hundred thirty-eight million, two hundred forty-seven thousand, four hundred sixty-three".