2118431788 has 48 divisors (see below), whose sum is σ = 4285884960. Its totient is φ = 907020800.

The previous prime is 2118431713. The next prime is 2118431789. The reversal of 2118431788 is 8871348112.

It is not an unprimeable number, because it can be changed into a prime (2118431789) 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, 32070 + ... + 72562.

It is an arithmetic number, because the mean of its divisors is an integer number (89289270).

Almost surely, 2^2118431788 is an apocalyptic number.

It is an amenable number.

2118431788 is an abundant number, since it is smaller than the sum of its proper divisors (2167453172).

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

2118431788 is a wasteful number, since it uses less digits than its factorization.

2118431788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40578 (or 40576 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 2118431788 is about 46026.4248883182. The cubic root of 2118431788 is about 1284.3148225352.

The spelling of 2118431788 in words is "two billion, one hundred eighteen million, four hundred thirty-one thousand, seven hundred eighty-eight".