21050629 has 2 divisors, whose sum is σ = 21050630. Its totient is φ = 21050628.

The previous prime is 21050611. The next prime is 21050677. The reversal of 21050629 is 92605012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 3157729 = 4230^2 + 1777^2 .

It is a cyclic number.

It is not a de Polignac number, because 21050629 - 2⁵ = 21050597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21050609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10525314 + 10525315.

It is an arithmetic number, because the mean of its divisors is an integer number (10525315).

Almost surely, 2^21050629 is an apocalyptic number.

It is an amenable number.

21050629 is a deficient number, since it is larger than the sum of its proper divisors (1).

21050629 is an equidigital number, since it uses as much as digits as its factorization.

21050629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 21050629 is about 4588.0964462400. The cubic root of 21050629 is about 276.1139564782.

The spelling of 21050629 in words is "twenty-one million, fifty thousand, six hundred twenty-nine".