1320203853 has 20 divisors (see below), whose sum is σ = 1992499740. Its totient is φ = 871057152.

The previous prime is 1320203837. The next prime is 1320203861. The reversal of 1320203853 is 3583020231.

1320203853 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 580472649 + 739731204 = 24093^2 + 27198^2 .

It is not a de Polignac number, because 1320203853 - 2⁴ = 1320203837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320203803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 76158 + ... + 91871.

It is an arithmetic number, because the mean of its divisors is an integer number (99624987).

Almost surely, 2^1320203853 is an apocalyptic number.

It is an amenable number.

1320203853 is a deficient number, since it is larger than the sum of its proper divisors (672295887).

1320203853 is an equidigital number, since it uses as much as digits as its factorization.

1320203853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168138 (or 168129 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1320203853 is about 36334.6095754447. The cubic root of 1320203853 is about 1097.0177769874.

It can be divided in two parts, 13202038 and 53, that added together give a triangular number (13202091 = T₅₁₃₈).

The spelling of 1320203853 in words is "one billion, three hundred twenty million, two hundred three thousand, eight hundred fifty-three".