18863405500 has 24 divisors (see below), whose sum is σ = 41197678704. Its totient is φ = 7545362000.

The previous prime is 18863405443. The next prime is 18863405503. The reversal of 18863405500 is 550436881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18863405503) 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 7 ways as a sum of consecutive naturals, for example, 18862906 + ... + 18863905.

It is an arithmetic number, because the mean of its divisors is an integer number (1716569946).

Almost surely, 2^18863405500 is an apocalyptic number.

18863405500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18863405500 is an abundant number, since it is smaller than the sum of its proper divisors (22334273204).

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

18863405500 is a wasteful number, since it uses less digits than its factorization.

18863405500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37726830 (or 37726818 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 18863405500 in words is "eighteen billion, eight hundred sixty-three million, four hundred five thousand, five hundred".