2106920 has 16 divisors (see below), whose sum is σ = 4740660. Its totient is φ = 842752.

The previous prime is 2106919. The next prime is 2106931. The reversal of 2106920 is 296012.

It can be written as a sum of positive squares in 2 ways, for example, as 2079364 + 27556 = 1442^2 + 166^2 .

It is a super-2 number, since 2×2106920² = 8878223772800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2106892 and 2106901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26297 + ... + 26376.

2^2106920 is an apocalyptic number.

2106920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106920 is an abundant number, since it is smaller than the sum of its proper divisors (2633740).

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

2106920 is a wasteful number, since it uses less digits than its factorization.

2106920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52684 (or 52680 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 2106920 is about 1451.5233377387. The cubic root of 2106920 is about 128.1984227194.

The spelling of 2106920 in words is "two million, one hundred six thousand, nine hundred twenty".