20201029 has 2 divisors, whose sum is σ = 20201030. Its totient is φ = 20201028.

The previous prime is 20201021. The next prime is 20201039. The reversal of 20201029 is 92010202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11189025 + 9012004 = 3345^2 + 3002^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201029 - 2³ = 20201021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100514 + 10100515.

It is an arithmetic number, because the mean of its divisors is an integer number (10100515).

Almost surely, 2^20201029 is an apocalyptic number.

It is an amenable number.

20201029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201029 is an equidigital number, since it uses as much as digits as its factorization.

20201029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20201029 is about 4494.5554841386. Note that the first 3 decimals coincide. The cubic root of 20201029 is about 272.3481925261.

The spelling of 20201029 in words is "twenty million, two hundred one thousand, twenty-nine".