2144672818 has 4 divisors (see below), whose sum is σ = 3217009230. Its totient is φ = 1072336408.

The previous prime is 2144672771. The next prime is 2144672819. The reversal of 2144672818 is 8182764412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1844101249 + 300571569 = 42943^2 + 17337^2 .

It is a super-2 number, since 2×2144672818² = 9199242992536122248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2144672819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536168203 + ... + 536168206.

Almost surely, 2^2144672818 is an apocalyptic number.

2144672818 is a deficient number, since it is larger than the sum of its proper divisors (1072336412).

2144672818 is a wasteful number, since it uses less digits than its factorization.

2144672818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072336411.

The product of its digits is 172032, while the sum is 43.

The square root of 2144672818 is about 46310.6123690888. The cubic root of 2144672818 is about 1289.5960151568.

The spelling of 2144672818 in words is "two billion, one hundred forty-four million, six hundred seventy-two thousand, eight hundred eighteen".