2139344718 has 32 divisors (see below), whose sum is σ = 4928446464. Its totient is φ = 606426912.

The previous prime is 2139344717. The next prime is 2139344741. The reversal of 2139344718 is 8174439312.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2139344718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139344717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195205 + ... + 205872.

It is an arithmetic number, because the mean of its divisors is an integer number (154013952).

Almost surely, 2^2139344718 is an apocalyptic number.

2139344718 is an abundant number, since it is smaller than the sum of its proper divisors (2789101746).

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

2139344718 is a wasteful number, since it uses less digits than its factorization.

2139344718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401216.

The product of its digits is 145152, while the sum is 42.

The square root of 2139344718 is about 46253.0509047782. The cubic root of 2139344718 is about 1288.5271972020.

The spelling of 2139344718 in words is "two billion, one hundred thirty-nine million, three hundred forty-four thousand, seven hundred eighteen".