20020157 has 2 divisors, whose sum is σ = 20020158. Its totient is φ = 20020156.

The previous prime is 20020151. The next prime is 20020163. The reversal of 20020157 is 75102002.

It is a balanced prime because it is at equal distance from previous prime (20020151) and next prime (20020163).

It can be written as a sum of positive squares in only one way, i.e., 20016676 + 3481 = 4474^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 20020157 - 2⁶ = 20020093 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 (20020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010078 + 10010079.

It is an arithmetic number, because the mean of its divisors is an integer number (10010079).

Almost surely, 2^20020157 is an apocalyptic number.

It is an amenable number.

20020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020157 is an equidigital number, since it uses as much as digits as its factorization.

20020157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 20020157 is about 4474.3890085687. The cubic root of 20020157 is about 271.5329219009.

Adding to 20020157 its reverse (75102002), we get a palindrome (95122159).

The spelling of 20020157 in words is "twenty million, twenty thousand, one hundred fifty-seven".