20038157 has 2 divisors, whose sum is σ = 20038158. Its totient is φ = 20038156.

The previous prime is 20038133. The next prime is 20038171. The reversal of 20038157 is 75183002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12823561 + 7214596 = 3581^2 + 2686^2 .

It is a cyclic number.

It is not a de Polignac number, because 20038157 - 2¹² = 20034061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20088157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10019078 + 10019079.

It is an arithmetic number, because the mean of its divisors is an integer number (10019079).

Almost surely, 2^20038157 is an apocalyptic number.

It is an amenable number.

20038157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20038157 is an equidigital number, since it uses as much as digits as its factorization.

20038157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 20038157 is about 4476.4000044679. The cubic root of 20038157 is about 271.6142753842.

The spelling of 20038157 in words is "twenty million, thirty-eight thousand, one hundred fifty-seven".