18226009457 has 2 divisors, whose sum is σ = 18226009458. Its totient is φ = 18226009456.

The previous prime is 18226009421. The next prime is 18226009471. The reversal of 18226009457 is 75490062281.

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., 18168613681 + 57395776 = 134791^2 + 7576^2 .

It is a cyclic number.

It is not a de Polignac number, because 18226009457 - 2²⁶ = 18158900593 is a prime.

It is not a weakly prime, because it can be changed into another prime (18226009057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9113004728 + 9113004729.

It is an arithmetic number, because the mean of its divisors is an integer number (9113004729).

Almost surely, 2^18226009457 is an apocalyptic number.

It is an amenable number.

18226009457 is a deficient number, since it is larger than the sum of its proper divisors (1).

18226009457 is an equidigital number, since it uses as much as digits as its factorization.

18226009457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 18226009457 in words is "eighteen billion, two hundred twenty-six million, nine thousand, four hundred fifty-seven".