2158018700 has 72 divisors (see below), whose sum is σ = 4953828768. Its totient is φ = 814302720.

The previous prime is 2158018699. The next prime is 2158018711. The reversal of 2158018700 is 78108512.

It is a happy 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, 161474 + ... + 174326.

Almost surely, 2^2158018700 is an apocalyptic number.

2158018700 is a gapful number since it is divisible by the number (20) 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 2158018700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476914384).

2158018700 is an abundant number, since it is smaller than the sum of its proper divisors (2795810068).

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

2158018700 is a wasteful number, since it uses less digits than its factorization.

2158018700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12963 (or 12956 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 2158018700 is about 46454.4798700836. The cubic root of 2158018700 is about 1292.2654540875.

The spelling of 2158018700 in words is "two billion, one hundred fifty-eight million, eighteen thousand, seven hundred".