2118251484 has 18 divisors (see below), whose sum is σ = 5354469120. Its totient is φ = 706083816.

The previous prime is 2118251467. The next prime is 2118251489. The reversal of 2118251484 is 4841528112.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 58840319 = 2118251484 / (2 + 1 + 1 + 8 + 2 + 5 + 1 + 4 + 8 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118251489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29420124 + ... + 29420195.

Almost surely, 2^2118251484 is an apocalyptic number.

It is an amenable number.

2118251484 is an abundant number, since it is smaller than the sum of its proper divisors (3236217636).

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

2118251484 is a wasteful number, since it uses less digits than its factorization.

2118251484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58840329 (or 58840324 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 2118251484 is about 46024.4661457360. The cubic root of 2118251484 is about 1284.2783846269.

Adding to 2118251484 its reverse (4841528112), we get a palindrome (6959779596).

The spelling of 2118251484 in words is "two billion, one hundred eighteen million, two hundred fifty-one thousand, four hundred eighty-four".