20000345 has 16 divisors (see below), whose sum is σ = 24820992. Its totient is φ = 15462720.

The previous prime is 20000339. The next prime is 20000353. The reversal of 20000345 is 54300002.

It is not a de Polignac number, because 20000345 - 2⁴ = 20000329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18284 + ... + 19346.

It is an arithmetic number, because the mean of its divisors is an integer number (1551312).

Almost surely, 2^20000345 is an apocalyptic number.

It is an amenable number.

20000345 is a deficient number, since it is larger than the sum of its proper divisors (4820647).

20000345 is a wasteful number, since it uses less digits than its factorization.

20000345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20000345 is about 4472.1745270059. The cubic root of 20000345 is about 271.4433224406.

Adding to 20000345 its reverse (54300002), we get a palindrome (74300347).

The spelling of 20000345 in words is "twenty million, three hundred forty-five", and thus it is an aban number.