1143342020 has 12 divisors (see below), whose sum is σ = 2401018284. Its totient is φ = 457336800.

The previous prime is 1143342019. The next prime is 1143342049. The reversal of 1143342020 is 202433411.

It can be written as a sum of positive squares in 2 ways, for example, as 728568064 + 414773956 = 26992^2 + 20366^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 57167101 = 1143342020 / (1 + 1 + 4 + 3 + 3 + 4 + 2 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1143341983 and 1143342001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28583531 + ... + 28583570.

It is an arithmetic number, because the mean of its divisors is an integer number (200084857).

Almost surely, 2^1143342020 is an apocalyptic number.

1143342020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143342020 is an abundant number, since it is smaller than the sum of its proper divisors (1257676264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1143342020 is a wasteful number, since it uses less digits than its factorization.

1143342020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57167110 (or 57167108 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1143342020 is about 33813.3408583062. The cubic root of 1143342020 is about 1045.6637557185.

Adding to 1143342020 its reverse (202433411), we get a palindrome (1345775431).

The spelling of 1143342020 in words is "one billion, one hundred forty-three million, three hundred forty-two thousand, twenty".