18763645954 has 4 divisors (see below), whose sum is σ = 28145468934. Its totient is φ = 9381822976.

The previous prime is 18763645921. The next prime is 18763645961. The reversal of 18763645954 is 45954636781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45954636781 = 163 ⋅281930287.

It can be written as a sum of positive squares in only one way, i.e., 10748920329 + 8014725625 = 103677^2 + 89525^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4690911487 + ... + 4690911490.

Almost surely, 2^18763645954 is an apocalyptic number.

18763645954 is a deficient number, since it is larger than the sum of its proper divisors (9381822980).

18763645954 is an equidigital number, since it uses as much as digits as its factorization.

18763645954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9381822979.

The product of its digits is 21772800, while the sum is 58.

The spelling of 18763645954 in words is "eighteen billion, seven hundred sixty-three million, six hundred forty-five thousand, nine hundred fifty-four".