20016975 has 48 divisors (see below), whose sum is σ = 38033280. Its totient is φ = 9187200.

The previous prime is 20016961. The next prime is 20016977. The reversal of 20016975 is 57961002.

It is not a de Polignac number, because 20016975 - 2⁵ = 20016943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20016977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15037 + ... + 16313.

It is an arithmetic number, because the mean of its divisors is an integer number (792360).

Almost surely, 2^20016975 is an apocalyptic number.

20016975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20016975 is a deficient number, since it is larger than the sum of its proper divisors (18016305).

20016975 is a wasteful number, since it uses less digits than its factorization.

20016975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20016975 is about 4474.0334151635. The cubic root of 20016975 is about 271.5185353414.

Adding to 20016975 its reverse (57961002), we get a palindrome (77977977).

The spelling of 20016975 in words is "twenty million, sixteen thousand, nine hundred seventy-five".