1340020003 has 12 divisors (see below), whose sum is σ = 1564608960. Its totient is φ = 1144307472.

The previous prime is 1340019953. The next prime is 1340020007. The reversal of 1340020003 is 3000200431.

It is not a de Polignac number, because 1340020003 - 2²¹ = 1337922851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340020007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37651 + ... + 64012.

It is an arithmetic number, because the mean of its divisors is an integer number (130384080).

Almost surely, 2^1340020003 is an apocalyptic number.

1340020003 is a deficient number, since it is larger than the sum of its proper divisors (224588957).

1340020003 is a wasteful number, since it uses less digits than its factorization.

1340020003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101946 (or 101939 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 1340020003 is about 36606.2836545859. The cubic root of 1340020003 is about 1102.4792571893.

Adding to 1340020003 its reverse (3000200431), we get a palindrome (4340220434).

The spelling of 1340020003 in words is "one billion, three hundred forty million, twenty thousand, three".