18808276973 has 2 divisors, whose sum is σ = 18808276974. Its totient is φ = 18808276972.

The previous prime is 18808276957. The next prime is 18808276997. The reversal of 18808276973 is 37967280881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18383834569 + 424442404 = 135587^2 + 20602^2 .

It is a cyclic number.

It is not a de Polignac number, because 18808276973 - 2⁴ = 18808276957 is a prime.

It is a super-3 number, since 3×18808276973³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18808276373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9404138486 + 9404138487.

It is an arithmetic number, because the mean of its divisors is an integer number (9404138487).

Almost surely, 2^18808276973 is an apocalyptic number.

It is an amenable number.

18808276973 is a deficient number, since it is larger than the sum of its proper divisors (1).

18808276973 is an equidigital number, since it uses as much as digits as its factorization.

18808276973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 18808276973 in words is "eighteen billion, eight hundred eight million, two hundred seventy-six thousand, nine hundred seventy-three".