2105420345 has 32 divisors (see below), whose sum is σ = 3017184768. Its totient is φ = 1379017728.

The previous prime is 2105420333. The next prime is 2105420357. The reversal of 2105420345 is 5430245012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2105420333) and next prime (2105420357).

It is a cyclic number.

It is not a de Polignac number, because 2105420345 - 2⁶ = 2105420281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 785147 + ... + 787823.

It is an arithmetic number, because the mean of its divisors is an integer number (94287024).

Almost surely, 2^2105420345 is an apocalyptic number.

It is an amenable number.

2105420345 is a deficient number, since it is larger than the sum of its proper divisors (911764423).

2105420345 is a wasteful number, since it uses less digits than its factorization.

2105420345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 2105420345 is about 45884.8596489082. The cubic root of 2105420345 is about 1281.6799931500.

Adding to 2105420345 its reverse (5430245012), we get a palindrome (7535665357).

The spelling of 2105420345 in words is "two billion, one hundred five million, four hundred twenty thousand, three hundred forty-five".