218474006293 has 2 divisors, whose sum is σ = 218474006294. Its totient is φ = 218474006292.

The previous prime is 218474006143. The next prime is 218474006353. The reversal of 218474006293 is 392600474812.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198824134609 + 19649871684 = 445897^2 + 140178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218474006293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218474006393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109237003146 + 109237003147.

It is an arithmetic number, because the mean of its divisors is an integer number (109237003147).

Almost surely, 2^218474006293 is an apocalyptic number.

It is an amenable number.

218474006293 is a deficient number, since it is larger than the sum of its proper divisors (1).

218474006293 is an equidigital number, since it uses as much as digits as its factorization.

218474006293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 218474006293 in words is "two hundred eighteen billion, four hundred seventy-four million, six thousand, two hundred ninety-three".