18966023940577 has 16 divisors (see below), whose sum is σ = 22189857289600. Its totient is φ = 16203638790864.

The previous prime is 18966023940551. The next prime is 18966023940601. The reversal of 18966023940577 is 77504932066981.

It is not a de Polignac number, because 18966023940577 - 2²³ = 18966015551969 is a prime.

It is a super-2 number, since 2×18966023940577² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18966023940277) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89950938 + ... + 90161539.

It is an arithmetic number, because the mean of its divisors is an integer number (1386866080600).

It is a 1-persistent number, because it is pandigital, but 2⋅18966023940577 = 37932047881154 is not.

Almost surely, 2^{18966023940577} is an apocalyptic number.

It is an amenable number.

18966023940577 is a deficient number, since it is larger than the sum of its proper divisors (3223833349023).

18966023940577 is an equidigital number, since it uses as much as digits as its factorization.

18966023940577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180112805 (or 180112791 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 67.

The spelling of 18966023940577 in words is "eighteen trillion, nine hundred sixty-six billion, twenty-three million, nine hundred forty thousand, five hundred seventy-seven".