18354872623 has 2 divisors, whose sum is σ = 18354872624. Its totient is φ = 18354872622.

The previous prime is 18354872617. The next prime is 18354872633. The reversal of 18354872623 is 32627845381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18354872623 - 2⁹ = 18354872111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18354872633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9177436311 + 9177436312.

It is an arithmetic number, because the mean of its divisors is an integer number (9177436312).

Almost surely, 2^18354872623 is an apocalyptic number.

18354872623 is a deficient number, since it is larger than the sum of its proper divisors (1).

18354872623 is an equidigital number, since it uses as much as digits as its factorization.

18354872623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 49.

The spelling of 18354872623 in words is "eighteen billion, three hundred fifty-four million, eight hundred seventy-two thousand, six hundred twenty-three".