20350917 has 6 divisors (see below), whose sum is σ = 29395782. Its totient is φ = 13567272.

The previous prime is 20350903. The next prime is 20350927. The reversal of 20350917 is 71905302.

It can be written as a sum of positive squares in only one way, i.e., 19660356 + 690561 = 4434^2 + 831^2 .

It is not a de Polignac number, because 20350917 - 2⁷ = 20350789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1130598 + ... + 1130615.

It is an arithmetic number, because the mean of its divisors is an integer number (4899297).

Almost surely, 2^20350917 is an apocalyptic number.

It is an amenable number.

20350917 is a deficient number, since it is larger than the sum of its proper divisors (9044865).

20350917 is a wasteful number, since it uses less digits than its factorization.

20350917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2261219 (or 2261216 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 20350917 is about 4511.1990645504. The cubic root of 20350917 is about 273.0201249102.

The spelling of 20350917 in words is "twenty million, three hundred fifty thousand, nine hundred seventeen".