18105907700 has 72 divisors (see below), whose sum is σ = 40077434880. Its totient is φ = 7097500800.

The previous prime is 18105907697. The next prime is 18105907727. The reversal of 18105907700 is 770950181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6777365 + ... + 6780035.

It is an arithmetic number, because the mean of its divisors is an integer number (556631040).

Almost surely, 2^18105907700 is an apocalyptic number.

18105907700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18105907700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20038717440).

18105907700 is an abundant number, since it is smaller than the sum of its proper divisors (21971527180).

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

18105907700 is a wasteful number, since it uses less digits than its factorization.

18105907700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017 (or 4010 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 38.

The spelling of 18105907700 in words is "eighteen billion, one hundred five million, nine hundred seven thousand, seven hundred".