2140180309 has 4 divisors (see below), whose sum is σ = 2213979660. Its totient is φ = 2066380960.

The previous prime is 2140180277. The next prime is 2140180313. The reversal of 2140180309 is 9030810412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 334780209 + 1805400100 = 18297^2 + 42490^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140180309 - 2⁵ = 2140180277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2140180319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36899632 + ... + 36899689.

It is an arithmetic number, because the mean of its divisors is an integer number (553494915).

Almost surely, 2^2140180309 is an apocalyptic number.

2140180309 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2140180309 is a deficient number, since it is larger than the sum of its proper divisors (73799351).

2140180309 is an equidigital number, since it uses as much as digits as its factorization.

2140180309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73799350.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 2140180309 is about 46262.0828432962. The cubic root of 2140180309 is about 1288.6949341688.

The spelling of 2140180309 in words is "two billion, one hundred forty million, one hundred eighty thousand, three hundred nine".