20361629 has 2 divisors, whose sum is σ = 20361630. Its totient is φ = 20361628.

The previous prime is 20361623. The next prime is 20361641. The reversal of 20361629 is 92616302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 4401604 = 3995^2 + 2098^2 .

It is a cyclic number.

It is not a de Polignac number, because 20361629 - 2²⁰ = 19313053 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20361623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180814 + 10180815.

It is an arithmetic number, because the mean of its divisors is an integer number (10180815).

Almost surely, 2^20361629 is an apocalyptic number.

It is an amenable number.

20361629 is a deficient number, since it is larger than the sum of its proper divisors (1).

20361629 is an equidigital number, since it uses as much as digits as its factorization.

20361629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20361629 is about 4512.3861758498. The cubic root of 20361629 is about 273.0680192072.

The spelling of 20361629 in words is "twenty million, three hundred sixty-one thousand, six hundred twenty-nine".