18766263089640 has 128 divisors (see below), whose sum is σ = 63076776347520. Its totient is φ = 4426440422400.

The previous prime is 18766263089621. The next prime is 18766263089699. The reversal of 18766263089640 is 4698036266781.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192070971 + ... + 192168650.

It is an arithmetic number, because the mean of its divisors is an integer number (492787315215).

Almost surely, 2^{18766263089640} is an apocalyptic number.

18766263089640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18766263089640 is an abundant number, since it is smaller than the sum of its proper divisors (44310513257880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18766263089640 is a wasteful number, since it uses less digits than its factorization.

18766263089640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384239683 (or 384239679 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 66.

The spelling of 18766263089640 in words is "eighteen trillion, seven hundred sixty-six billion, two hundred sixty-three million, eighty-nine thousand, six hundred forty".