18162980500 has 96 divisors (see below), whose sum is σ = 45666915840. Its totient is φ = 6181689600.

The previous prime is 18162980497. The next prime is 18162980501. The reversal of 18162980500 is 508926181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18162980501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 460561 + ... + 498439.

It is an arithmetic number, because the mean of its divisors is an integer number (475697040).

Almost surely, 2^18162980500 is an apocalyptic number.

18162980500 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 18162980500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22833457920).

18162980500 is an abundant number, since it is smaller than the sum of its proper divisors (27503935340).

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

18162980500 is a wasteful number, since it uses less digits than its factorization.

18162980500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38042 (or 38030 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The spelling of 18162980500 in words is "eighteen billion, one hundred sixty-two million, nine hundred eighty thousand, five hundred".