2019812 has 6 divisors (see below), whose sum is σ = 3534678. Its totient is φ = 1009904.

The previous prime is 2019811. The next prime is 2019817. The reversal of 2019812 is 2189102.

It can be written as a sum of positive squares in only one way, i.e., 1290496 + 729316 = 1136^2 + 854^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2019811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252473 + ... + 252480.

It is an arithmetic number, because the mean of its divisors is an integer number (589113).

2^2019812 is an apocalyptic number.

It is an amenable number.

2019812 is a deficient number, since it is larger than the sum of its proper divisors (1514866).

2019812 is a wasteful number, since it uses less digits than its factorization.

2019812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504957 (or 504955 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2019812 is about 1421.2009006471. The cubic root of 2019812 is about 126.4067647130.

The spelling of 2019812 in words is "two million, nineteen thousand, eight hundred twelve".