18203230775213 has 16 divisors (see below), whose sum is σ = 19937393113536. Its totient is φ = 16482418467840.

The previous prime is 18203230775167. The next prime is 18203230775251. The reversal of 18203230775213 is 31257703230281.

It is a cyclic number.

It is not a de Polignac number, because 18203230775213 - 2⁸ = 18203230774957 is a prime.

It is a super-2 number, since 2×18203230775213² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18203230771213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425306 + ... + 6048747.

It is an arithmetic number, because the mean of its divisors is an integer number (1246087069596).

Almost surely, 2^{18203230775213} is an apocalyptic number.

It is an amenable number.

18203230775213 is a deficient number, since it is larger than the sum of its proper divisors (1734162338323).

18203230775213 is a wasteful number, since it uses less digits than its factorization.

18203230775213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475084.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 18203230775213 in words is "eighteen trillion, two hundred three billion, two hundred thirty million, seven hundred seventy-five thousand, two hundred thirteen".