20315075 has 24 divisors (see below), whose sum is σ = 28379136. Its totient is φ = 14292000.

The previous prime is 20315069. The next prime is 20315081. The reversal of 20315075 is 57051302.

It is an interprime number because it is at equal distance from previous prime (20315069) and next prime (20315081).

It is not a de Polignac number, because 20315075 - 2⁶ = 20315011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20315075.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7334 + ... + 9716.

It is an arithmetic number, because the mean of its divisors is an integer number (1182464).

Almost surely, 2^20315075 is an apocalyptic number.

20315075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20315075 is a deficient number, since it is larger than the sum of its proper divisors (8064061).

20315075 is a wasteful number, since it uses less digits than its factorization.

20315075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435 (or 2430 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 20315075 is about 4507.2247558781. The cubic root of 20315075 is about 272.8597498645.

Adding to 20315075 its reverse (57051302), we get a palindrome (77366377).

The spelling of 20315075 in words is "twenty million, three hundred fifteen thousand, seventy-five".