20002345 has 16 divisors (see below), whose sum is σ = 27564480. Its totient is φ = 13780800.

The previous prime is 20002337. The next prime is 20002361. The reversal of 20002345 is 54320002.

It is not a de Polignac number, because 20002345 - 2³ = 20002337 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8526 + ... + 10615.

It is an arithmetic number, because the mean of its divisors is an integer number (1722780).

Almost surely, 2^20002345 is an apocalyptic number.

It is an amenable number.

20002345 is a deficient number, since it is larger than the sum of its proper divisors (7562135).

20002345 is a wasteful number, since it uses less digits than its factorization.

20002345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19176.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20002345 is about 4472.3981262853. The cubic root of 20002345 is about 271.4523700937.

Adding to 20002345 its reverse (54320002), we get a palindrome (74322347).

The spelling of 20002345 in words is "twenty million, two thousand, three hundred forty-five".