2130818 has 4 divisors (see below), whose sum is σ = 3196230. Its totient is φ = 1065408.

The previous prime is 2130809. The next prime is 2130853. The reversal of 2130818 is 8180312.

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., 1968409 + 162409 = 1403^2 + 403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2130793 and 2130802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532703 + ... + 532706.

2^2130818 is an apocalyptic number.

2130818 is a deficient number, since it is larger than the sum of its proper divisors (1065412).

2130818 is a wasteful number, since it uses less digits than its factorization.

2130818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065411.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 2130818 is about 1459.7321672142. The cubic root of 2130818 is about 128.6813037241.

The spelling of 2130818 in words is "two million, one hundred thirty thousand, eight hundred eighteen".