20159137 has 2 divisors, whose sum is σ = 20159138. Its totient is φ = 20159136.

The previous prime is 20159119. The next prime is 20159177. The reversal of 20159137 is 73195102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16777216 + 3381921 = 4096^2 + 1839^2 .

It is a cyclic number.

It is not a de Polignac number, because 20159137 - 2²³ = 11770529 is a prime.

It is not a weakly prime, because it can be changed into another prime (20159107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10079568 + 10079569.

It is an arithmetic number, because the mean of its divisors is an integer number (10079569).

Almost surely, 2^20159137 is an apocalyptic number.

It is an amenable number.

20159137 is a deficient number, since it is larger than the sum of its proper divisors (1).

20159137 is an equidigital number, since it uses as much as digits as its factorization.

20159137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 20159137 is about 4489.8927604120. The cubic root of 20159137 is about 272.1598010301.

The spelling of 20159137 in words is "twenty million, one hundred fifty-nine thousand, one hundred thirty-seven".