17800945313 has 2 divisors, whose sum is σ = 17800945314. Its totient is φ = 17800945312.

The previous prime is 17800945303. The next prime is 17800945363. The reversal of 17800945313 is 31354900871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17756095504 + 44849809 = 133252^2 + 6697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17800945313 is a prime.

It is a super-3 number, since 3×17800945313³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (17800945303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8900472656 + 8900472657.

It is an arithmetic number, because the mean of its divisors is an integer number (8900472657).

Almost surely, 2^17800945313 is an apocalyptic number.

It is an amenable number.

17800945313 is a deficient number, since it is larger than the sum of its proper divisors (1).

17800945313 is an equidigital number, since it uses as much as digits as its factorization.

17800945313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

It can be divided in two parts, 178009 and 45313, that added together give a palindrome (223322).

The spelling of 17800945313 in words is "seventeen billion, eight hundred million, nine hundred forty-five thousand, three hundred thirteen".