18315001839603 has 56 divisors (see below), whose sum is σ = 29259988272592. Its totient is φ = 10182850905024.

The previous prime is 18315001839601. The next prime is 18315001839637. The reversal of 18315001839603 is 30693810051381.

It is not a de Polignac number, because 18315001839603 - 2¹ = 18315001839601 is a prime.

It is a super-2 number, since 2×18315001839603² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18315001839601) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 12357801 + ... + 13760277.

It is an arithmetic number, because the mean of its divisors is an integer number (522499790582).

Almost surely, 2^{18315001839603} is an apocalyptic number.

18315001839603 is a deficient number, since it is larger than the sum of its proper divisors (10944986432989).

18315001839603 is an frugal number, since it uses more digits than its factorization.

18315001839603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402559 (or 1402524 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 18315001839603 in words is "eighteen trillion, three hundred fifteen billion, one million, eight hundred thirty-nine thousand, six hundred three".