2091418 has 12 divisors (see below), whose sum is σ = 3649482. Its totient is φ = 896280.

The previous prime is 2091409. The next prime is 2091421. The reversal of 2091418 is 8141902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1117249 + 974169 = 1057^2 + 987^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2091392 and 2091401.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10573 + ... + 10768.

2^2091418 is an apocalyptic number.

2091418 is a deficient number, since it is larger than the sum of its proper divisors (1558064).

2091418 is a wasteful number, since it uses less digits than its factorization.

2091418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21357 (or 21350 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2091418 is about 1446.1735718786. The cubic root of 2091418 is about 127.8832349876.

The spelling of 2091418 in words is "two million, ninety-one thousand, four hundred eighteen".