1820035253 has 4 divisors (see below), whose sum is σ = 1820222208. Its totient is φ = 1819848300.

The previous prime is 1820035237. The next prime is 1820035267. The reversal of 1820035253 is 3525300281.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3525300281 = 431 ⋅8179351.

It is a cyclic number.

It is not a de Polignac number, because 1820035253 - 2⁴ = 1820035237 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 (1820055253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78023 + ... + 98628.

It is an arithmetic number, because the mean of its divisors is an integer number (455055552).

Almost surely, 2^1820035253 is an apocalyptic number.

It is an amenable number.

1820035253 is a deficient number, since it is larger than the sum of its proper divisors (186955).

1820035253 is a wasteful number, since it uses less digits than its factorization.

1820035253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186954.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1820035253 is about 42661.8711849351. The cubic root of 1820035253 is about 1220.9370327390.

The spelling of 1820035253 in words is "one billion, eight hundred twenty million, thirty-five thousand, two hundred fifty-three".