20833157 has 2 divisors, whose sum is σ = 20833158. Its totient is φ = 20833156.

The previous prime is 20833133. The next prime is 20833201. The reversal of 20833157 is 75133802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12716356 + 8116801 = 3566^2 + 2849^2 .

It is a cyclic number.

It is not a de Polignac number, because 20833157 - 2⁶ = 20833093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20833357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10416578 + 10416579.

It is an arithmetic number, because the mean of its divisors is an integer number (10416579).

Almost surely, 2^20833157 is an apocalyptic number.

It is an amenable number.

20833157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20833157 is an equidigital number, since it uses as much as digits as its factorization.

20833157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 20833157 is about 4564.3353294866. The cubic root of 20833157 is about 275.1598277526.

Adding to 20833157 its reverse (75133802), we get a palindrome (95966959).

The spelling of 20833157 in words is "twenty million, eight hundred thirty-three thousand, one hundred fifty-seven".