18772750473 has 4 divisors (see below), whose sum is σ = 25030333968. Its totient is φ = 12515166980.

The previous prime is 18772750471. The next prime is 18772750537. The reversal of 18772750473 is 37405727781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37405727781 = 3 ⋅12468575927.

It is a cyclic number.

It is not a de Polignac number, because 18772750473 - 2¹ = 18772750471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18772750471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3128791743 + ... + 3128791748.

It is an arithmetic number, because the mean of its divisors is an integer number (6257583492).

Almost surely, 2^18772750473 is an apocalyptic number.

It is an amenable number.

18772750473 is a deficient number, since it is larger than the sum of its proper divisors (6257583495).

18772750473 is an equidigital number, since it uses as much as digits as its factorization.

18772750473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6257583494.

The product of its (nonzero) digits is 2304960, while the sum is 51.

The spelling of 18772750473 in words is "eighteen billion, seven hundred seventy-two million, seven hundred fifty thousand, four hundred seventy-three".