18868775745 has 64 divisors (see below), whose sum is σ = 32361534720. Its totient is φ = 9354928128.

The previous prime is 18868775741. The next prime is 18868775747. The reversal of 18868775745 is 54757786881.

It is not a de Polignac number, because 18868775745 - 2² = 18868775741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18868775741) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7164949 + ... + 7167581.

It is an arithmetic number, because the mean of its divisors is an integer number (505648980).

Almost surely, 2^18868775745 is an apocalyptic number.

18868775745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18868775745 is a deficient number, since it is larger than the sum of its proper divisors (13492758975).

18868775745 is a wasteful number, since it uses less digits than its factorization.

18868775745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2994.

The product of its digits is 105369600, while the sum is 66.

The spelling of 18868775745 in words is "eighteen billion, eight hundred sixty-eight million, seven hundred seventy-five thousand, seven hundred forty-five".