18019820023 has 2 divisors, whose sum is σ = 18019820024. Its totient is φ = 18019820022.

The previous prime is 18019820017. The next prime is 18019820029. The reversal of 18019820023 is 32002891081.

It is a balanced prime because it is at equal distance from previous prime (18019820017) and next prime (18019820029).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18019820023 is a prime.

It is a super-2 number, since 2×18019820023² (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 (18019820029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9009910011 + 9009910012.

It is an arithmetic number, because the mean of its divisors is an integer number (9009910012).

Almost surely, 2^18019820023 is an apocalyptic number.

18019820023 is a deficient number, since it is larger than the sum of its proper divisors (1).

18019820023 is an equidigital number, since it uses as much as digits as its factorization.

18019820023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 18019820023 in words is "eighteen billion, nineteen million, eight hundred twenty thousand, twenty-three".