1820040052 has 12 divisors (see below), whose sum is σ = 3185533540. Its totient is φ = 909887616.

The previous prime is 1820040041. The next prime is 1820040067. The reversal of 1820040052 is 2500400281.

It can be written as a sum of positive squares in 2 ways, for example, as 1407300196 + 412739856 = 37514^2 + 20316^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1948 + ... + 60364.

Almost surely, 2^1820040052 is an apocalyptic number.

It is an amenable number.

1820040052 is a deficient number, since it is larger than the sum of its proper divisors (1365493488).

1820040052 is a wasteful number, since it uses less digits than its factorization.

1820040052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66210 (or 66208 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1820040052 is about 42661.9274295009. The cubic root of 1820040052 is about 1220.9381058449.

The spelling of 1820040052 in words is "one billion, eight hundred twenty million, forty thousand, fifty-two".