20712075 has 24 divisors (see below), whose sum is σ = 35735808. Its totient is φ = 10565280.

The previous prime is 20712067. The next prime is 20712077. The reversal of 20712075 is 57021702.

It is not a de Polignac number, because 20712075 - 2³ = 20712067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20712077) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4279 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (1488992).

Almost surely, 2^20712075 is an apocalyptic number.

20712075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20712075 is a deficient number, since it is larger than the sum of its proper divisors (15023733).

20712075 is a wasteful number, since it uses less digits than its factorization.

20712075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12043 (or 12038 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 20712075 is about 4551.0520761688. The cubic root of 20712075 is about 274.6257167156.

Adding to 20712075 its reverse (57021702), we get a palindrome (77733777).

The spelling of 20712075 in words is "twenty million, seven hundred twelve thousand, seventy-five".