18332739509 has 24 divisors (see below), whose sum is σ = 21454836480. Its totient is φ = 15618972096.

The previous prime is 18332739487. The next prime is 18332739511. The reversal of 18332739509 is 90593723381.

It is not a de Polignac number, because 18332739509 - 2²⁴ = 18315962293 is a prime.

It is a super-2 number, since 2×18332739509² (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 (18332739709) 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 23 ways as a sum of consecutive naturals, for example, 10421372 + ... + 10423130.

It is an arithmetic number, because the mean of its divisors is an integer number (893951520).

Almost surely, 2^18332739509 is an apocalyptic number.

It is an amenable number.

18332739509 is a deficient number, since it is larger than the sum of its proper divisors (3122096971).

18332739509 is a wasteful number, since it uses less digits than its factorization.

18332739509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2937 (or 2930 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 50.

The spelling of 18332739509 in words is "eighteen billion, three hundred thirty-two million, seven hundred thirty-nine thousand, five hundred nine".