2187648818 has 12 divisors (see below), whose sum is σ = 3430350798. Its totient is φ = 1046266320.

The previous prime is 2187648811. The next prime is 2187648823. The reversal of 2187648818 is 8188467812.

It can be written as a sum of positive squares in only one way, i.e., 1207771009 + 979877809 = 34753^2 + 31303^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2187648818.

It is not an unprimeable number, because it can be changed into a prime (2187648811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1032803 + ... + 1034918.

Almost surely, 2^2187648818 is an apocalyptic number.

2187648818 is a deficient number, since it is larger than the sum of its proper divisors (1242701980).

2187648818 is a wasteful number, since it uses less digits than its factorization.

2187648818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067769 (or 2067746 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 53.

The square root of 2187648818 is about 46772.3082389569. The cubic root of 2187648818 is about 1298.1529623795.

The spelling of 2187648818 in words is "two billion, one hundred eighty-seven million, six hundred forty-eight thousand, eight hundred eighteen".