2001946018 has 4 divisors (see below), whose sum is σ = 3002919030. Its totient is φ = 1000973008.

The previous prime is 2001945983. The next prime is 2001946021. The reversal of 2001946018 is 8106491002.

It is a happy number.

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., 1964528329 + 37417689 = 44323^2 + 6117^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500486503 + ... + 500486506.

Almost surely, 2^2001946018 is an apocalyptic number.

2001946018 is a deficient number, since it is larger than the sum of its proper divisors (1000973012).

2001946018 is a wasteful number, since it uses less digits than its factorization.

2001946018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000973011.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 2001946018 is about 44743.1114027623. Note that the first 3 decimals coincide. The cubic root of 2001946018 is about 1260.3295556039.

The spelling of 2001946018 in words is "two billion, one million, nine hundred forty-six thousand, eighteen".