20203129 has 2 divisors, whose sum is σ = 20203130. Its totient is φ = 20203128.

The previous prime is 20203093. The next prime is 20203133. The reversal of 20203129 is 92130202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14077504 + 6125625 = 3752^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 20203129 - 2²¹ = 18105977 is a prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (20206129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10101564 + 10101565.

It is an arithmetic number, because the mean of its divisors is an integer number (10101565).

Almost surely, 2^20203129 is an apocalyptic number.

It is an amenable number.

20203129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20203129 is an equidigital number, since it uses as much as digits as its factorization.

20203129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 20203129 is about 4494.7890940510. The cubic root of 20203129 is about 272.3576295270.

The spelling of 20203129 in words is "twenty million, two hundred three thousand, one hundred twenty-nine".