18877031324207 has 16 divisors (see below), whose sum is σ = 21614272872192. Its totient is φ = 16149927666240.

The previous prime is 18877031324147. The next prime is 18877031324209. The reversal of 18877031324207 is 70242313077881.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18877031324207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18877031324209) 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, 31652588 + ... + 32243454.

It is an arithmetic number, because the mean of its divisors is an integer number (1350892054512).

Almost surely, 2^{18877031324207} is an apocalyptic number.

18877031324207 is a deficient number, since it is larger than the sum of its proper divisors (2737241547985).

18877031324207 is an equidigital number, since it uses as much as digits as its factorization.

18877031324207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599438.

The product of its (nonzero) digits is 3161088, while the sum is 53.

The spelling of 18877031324207 in words is "eighteen trillion, eight hundred seventy-seven billion, thirty-one million, three hundred twenty-four thousand, two hundred seven".