17813988623 has 2 divisors, whose sum is σ = 17813988624. Its totient is φ = 17813988622.

The previous prime is 17813988581. The next prime is 17813988637. The reversal of 17813988623 is 32688931871.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17813988623 - 2¹⁶ = 17813923087 is a prime.

It is a super-2 number, since 2×17813988623² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17813988223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8906994311 + 8906994312.

It is an arithmetic number, because the mean of its divisors is an integer number (8906994312).

Almost surely, 2^17813988623 is an apocalyptic number.

17813988623 is a deficient number, since it is larger than the sum of its proper divisors (1).

17813988623 is an equidigital number, since it uses as much as digits as its factorization.

17813988623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 56.

The spelling of 17813988623 in words is "seventeen billion, eight hundred thirteen million, nine hundred eighty-eight thousand, six hundred twenty-three".