18047426919 has 16 divisors (see below), whose sum is σ = 24196940544. Its totient is φ = 11964859200.

The previous prime is 18047426893. The next prime is 18047426939. The reversal of 18047426919 is 91962474081.

It is not a de Polignac number, because 18047426919 - 2¹² = 18047422823 is a prime.

It is a super-2 number, since 2×18047426919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18047426939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813859 + ... + 835739.

It is an arithmetic number, because the mean of its divisors is an integer number (1512308784).

Almost surely, 2^18047426919 is an apocalyptic number.

18047426919 is a deficient number, since it is larger than the sum of its proper divisors (6149513625).

18047426919 is a wasteful number, since it uses less digits than its factorization.

18047426919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23398.

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 18047426919 in words is "eighteen billion, forty-seven million, four hundred twenty-six thousand, nine hundred nineteen".