18473237481 has 16 divisors (see below), whose sum is σ = 25642641600. Its totient is φ = 11815073088.

The previous prime is 18473237479. The next prime is 18473237491.

18473237481 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18473237481 - 2¹ = 18473237479 is a prime.

It is a super-2 number, since 2×18473237481² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18473237481.

It is not an unprimeable number, because it can be changed into a prime (18473237491) 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, 662571 + ... + 689888.

It is an arithmetic number, because the mean of its divisors is an integer number (1602665100).

Almost surely, 2^18473237481 is an apocalyptic number.

It is an amenable number.

18473237481 is a deficient number, since it is larger than the sum of its proper divisors (7169404119).

18473237481 is a wasteful number, since it uses less digits than its factorization.

18473237481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352648.

The product of its digits is 903168, while the sum is 48.

The spelling of 18473237481 in words is "eighteen billion, four hundred seventy-three million, two hundred thirty-seven thousand, four hundred eighty-one".