20945075 has 12 divisors (see below), whose sum is σ = 26066040. Its totient is φ = 16695360.

The previous prime is 20945053. The next prime is 20945081. The reversal of 20945075 is 57054902.

It is not a de Polignac number, because 20945075 - 2¹² = 20940979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6311 + ... + 9039.

It is an arithmetic number, because the mean of its divisors is an integer number (2172170).

Almost surely, 2^20945075 is an apocalyptic number.

20945075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20945075 is a deficient number, since it is larger than the sum of its proper divisors (5120965).

20945075 is a wasteful number, since it uses less digits than its factorization.

20945075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046 (or 3041 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 20945075 is about 4576.5789625003. The cubic root of 20945075 is about 275.6516776162.

Adding to 20945075 its reverse (57054902), we get a palindrome (77999977).

The spelling of 20945075 in words is "twenty million, nine hundred forty-five thousand, seventy-five".