18385962439 has 4 divisors (see below), whose sum is σ = 19800267256. Its totient is φ = 16971657624.

The previous prime is 18385962421. The next prime is 18385962499. The reversal of 18385962439 is 93426958381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18385962439 - 2¹¹ = 18385960391 is a prime.

It is a super-2 number, since 2×18385962439² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18385962499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707152389 + ... + 707152414.

It is an arithmetic number, because the mean of its divisors is an integer number (4950066814).

Almost surely, 2^18385962439 is an apocalyptic number.

18385962439 is a deficient number, since it is larger than the sum of its proper divisors (1414304817).

18385962439 is a wasteful number, since it uses less digits than its factorization.

18385962439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1414304816.

The product of its digits is 11197440, while the sum is 58.

The spelling of 18385962439 in words is "eighteen billion, three hundred eighty-five million, nine hundred sixty-two thousand, four hundred thirty-nine".