2102019 has 4 divisors (see below), whose sum is σ = 2802696. Its totient is φ = 1401344.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2102019 is 9102012.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2102019 - 2¹³ = 2093827 is a prime.

It is a super-2 number, since 2×2102019² = 8836967752722, which contains 22 as substring.

It is a D-number.

2102019 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2101989 and 2102007.

It is not an unprimeable number, because it can be changed into a prime (2102069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350334 + ... + 350339.

It is an arithmetic number, because the mean of its divisors is an integer number (700674).

2^2102019 is an apocalyptic number.

2102019 is a deficient number, since it is larger than the sum of its proper divisors (700677).

2102019 is an equidigital number, since it uses as much as digits as its factorization.

2102019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700676.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2102019 is about 1449.8341284437. The cubic root of 2102019 is about 128.0989428668.

The spelling of 2102019 in words is "two million, one hundred two thousand, nineteen".