1820040053 has 4 divisors (see below), whose sum is σ = 1960043148. Its totient is φ = 1680036960.

The previous prime is 1820040041. The next prime is 1820040067. The reversal of 1820040053 is 3500400281.

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

It can be written as a sum of positive squares in 2 ways, for example, as 722641924 + 1097398129 = 26882^2 + 33127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820040053 - 2⁶ = 1820039989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820040023) 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, 70001528 + ... + 70001553.

It is an arithmetic number, because the mean of its divisors is an integer number (490010787).

Almost surely, 2^1820040053 is an apocalyptic number.

1820040053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1820040053 is a deficient number, since it is larger than the sum of its proper divisors (140003095).

1820040053 is a wasteful number, since it uses less digits than its factorization.

1820040053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140003094.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1820040053 is about 42661.9274412209. The cubic root of 1820040053 is about 1220.9381060685.

The spelling of 1820040053 in words is "one billion, eight hundred twenty million, forty thousand, fifty-three".