2101830 has 16 divisors (see below), whose sum is σ = 5044464. Its totient is φ = 560480.

The previous prime is 2101823. The next prime is 2101843. The reversal of 2101830 is 381012.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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

It is a congruent number.

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, 35001 + ... + 35060.

It is an arithmetic number, because the mean of its divisors is an integer number (315279).

2^2101830 is an apocalyptic number.

2101830 is an abundant number, since it is smaller than the sum of its proper divisors (2942634).

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

2101830 is a wasteful number, since it uses less digits than its factorization.

2101830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70071.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 2101830 is about 1449.7689471085. The cubic root of 2101830 is about 128.0951034747.

Adding to 2101830 its reverse (381012), we get a palindrome (2482842).

The spelling of 2101830 in words is "two million, one hundred one thousand, eight hundred thirty".