21182300118 has 160 divisors (see below), whose sum is σ = 59417582400. Its totient is φ = 5499518976.

The previous prime is 21182300071. The next prime is 21182300137. The reversal of 21182300118 is 81100328112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21182300091 and 21182300100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 540118 + ... + 578006.

It is an arithmetic number, because the mean of its divisors is an integer number (371359890).

Almost surely, 2^21182300118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21182300118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29708791200).

21182300118 is an abundant number, since it is smaller than the sum of its proper divisors (38235282282).

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

21182300118 is a wasteful number, since it uses less digits than its factorization.

21182300118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37956 (or 37947 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The spelling of 21182300118 in words is "twenty-one billion, one hundred eighty-two million, three hundred thousand, one hundred eighteen".