2120018 has 4 divisors (see below), whose sum is σ = 3180030. Its totient is φ = 1060008.

The previous prime is 2120017. The next prime is 2120021. The reversal of 2120018 is 8100212.

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., 1923769 + 196249 = 1387^2 + 443^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2119984 and 2120011.

It is not an unprimeable number, because it can be changed into a prime (2120017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530003 + ... + 530006.

2^2120018 is an apocalyptic number.

2120018 is a deficient number, since it is larger than the sum of its proper divisors (1060012).

2120018 is a wasteful number, since it uses less digits than its factorization.

2120018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060011.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2120018 is about 1456.0281590684. The cubic root of 2120018 is about 128.4635293452.

The spelling of 2120018 in words is "two million, one hundred twenty thousand, eighteen".