2101836 has 24 divisors (see below), whose sum is σ = 5350464. Its totient is φ = 636880.

The previous prime is 2101823. The next prime is 2101843. The reversal of 2101836 is 6381012.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7830 + ... + 8093.

It is an arithmetic number, because the mean of its divisors is an integer number (222936).

2^2101836 is an apocalyptic number.

It is an amenable number.

2101836 is an abundant number, since it is smaller than the sum of its proper divisors (3248628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101836 is a wasteful number, since it uses less digits than its factorization.

2101836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15941 (or 15939 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 2101836 is about 1449.7710164022. The cubic root of 2101836 is about 128.0952253637.

Adding to 2101836 its reverse (6381012), we get a palindrome (8482848).

The spelling of 2101836 in words is "two million, one hundred one thousand, eight hundred thirty-six".