18949280271 has 8 divisors (see below), whose sum is σ = 25273008384. Its totient is φ = 12629202840.

The previous prime is 18949280269. The next prime is 18949280297. The reversal of 18949280271 is 17208294981.

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 18949280271 - 2¹ = 18949280269 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949280201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 900535 + ... + 921336.

It is an arithmetic number, because the mean of its divisors is an integer number (3159126048).

Almost surely, 2^18949280271 is an apocalyptic number.

18949280271 is a deficient number, since it is larger than the sum of its proper divisors (6323728113).

18949280271 is a wasteful number, since it uses less digits than its factorization.

18949280271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825341.

The product of its (nonzero) digits is 580608, while the sum is 51.

The spelling of 18949280271 in words is "eighteen billion, nine hundred forty-nine million, two hundred eighty thousand, two hundred seventy-one".