18772745207 has 4 divisors (see below), whose sum is σ = 18773441400. Its totient is φ = 18772049016.

The previous prime is 18772745191. The next prime is 18772745263. The reversal of 18772745207 is 70254727781.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18772745207 - 2⁴ = 18772745191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18772745297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305948 + ... + 362145.

It is an arithmetic number, because the mean of its divisors is an integer number (4693360350).

Almost surely, 2^18772745207 is an apocalyptic number.

18772745207 is a deficient number, since it is larger than the sum of its proper divisors (696193).

18772745207 is an equidigital number, since it uses as much as digits as its factorization.

18772745207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696192.

The product of its (nonzero) digits is 1536640, while the sum is 50.

The spelling of 18772745207 in words is "eighteen billion, seven hundred seventy-two million, seven hundred forty-five thousand, two hundred seven".