2118745420 has 24 divisors (see below), whose sum is σ = 4853853648. Its totient is φ = 770452800.

The previous prime is 2118745373. The next prime is 2118745427. The reversal of 2118745420 is 245478112.

It is not an unprimeable number, because it can be changed into a prime (2118745427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4815111 + ... + 4815550.

It is an arithmetic number, because the mean of its divisors is an integer number (202243902).

Almost surely, 2^2118745420 is an apocalyptic number.

2118745420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118745420 is an abundant number, since it is smaller than the sum of its proper divisors (2735108228).

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

2118745420 is a wasteful number, since it uses less digits than its factorization.

2118745420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9630681 (or 9630679 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 2118745420 is about 46029.8318484871. The cubic root of 2118745420 is about 1284.3781999751.

The spelling of 2118745420 in words is "two billion, one hundred eighteen million, seven hundred forty-five thousand, four hundred twenty".