18738324523 has 2 divisors, whose sum is σ = 18738324524. Its totient is φ = 18738324522.

The previous prime is 18738324487. The next prime is 18738324551. The reversal of 18738324523 is 32542383781.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18738324523 - 2¹⁷ = 18738193451 is a prime.

It is a super-2 number, since 2×18738324523² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (18738324593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9369162261 + 9369162262.

It is an arithmetic number, because the mean of its divisors is an integer number (9369162262).

Almost surely, 2^18738324523 is an apocalyptic number.

18738324523 is a deficient number, since it is larger than the sum of its proper divisors (1).

18738324523 is an equidigital number, since it uses as much as digits as its factorization.

18738324523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 46.

The spelling of 18738324523 in words is "eighteen billion, seven hundred thirty-eight million, three hundred twenty-four thousand, five hundred twenty-three".