2005402345 has 48 divisors (see below), whose sum is σ = 2598785280. Its totient is φ = 1484517888.

The previous prime is 2005402337. The next prime is 2005402349. The reversal of 2005402345 is 5432045002.

It is not a de Polignac number, because 2005402345 - 2³ = 2005402337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2005402349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14427286 + ... + 14427424.

It is an arithmetic number, because the mean of its divisors is an integer number (54141360).

Almost surely, 2^2005402345 is an apocalyptic number.

It is an amenable number.

2005402345 is a deficient number, since it is larger than the sum of its proper divisors (593382935).

2005402345 is a wasteful number, since it uses less digits than its factorization.

2005402345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 2005402345 is about 44781.7188705391. The cubic root of 2005402345 is about 1261.0544513664.

Adding to 2005402345 its reverse (5432045002), we get a palindrome (7437447347).

The spelling of 2005402345 in words is "two billion, five million, four hundred two thousand, three hundred forty-five".