20345107 has 8 divisors (see below), whose sum is σ = 21816000. Its totient is φ = 18904704.

The previous prime is 20345093. The next prime is 20345161. The reversal of 20345107 is 70154302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20345107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6232 + ... + 8917.

It is an arithmetic number, because the mean of its divisors is an integer number (2727000).

Almost surely, 2^20345107 is an apocalyptic number.

20345107 is a deficient number, since it is larger than the sum of its proper divisors (1470893).

20345107 is a wasteful number, since it uses less digits than its factorization.

20345107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15245.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20345107 is about 4510.5550656211. Note that the first 3 decimals coincide. The cubic root of 20345107 is about 272.9941408574.

Adding to 20345107 its reverse (70154302), we get a palindrome (90499409).

The spelling of 20345107 in words is "twenty million, three hundred forty-five thousand, one hundred seven".