20916029 has 2 divisors, whose sum is σ = 20916030. Its totient is φ = 20916028.

The previous prime is 20916019. The next prime is 20916043. The reversal of 20916029 is 92061902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20268004 + 648025 = 4502^2 + 805^2 .

It is a cyclic number.

It is not a de Polignac number, because 20916029 - 2²⁰ = 19867453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20915992 and 20916010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20916019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10458014 + 10458015.

It is an arithmetic number, because the mean of its divisors is an integer number (10458015).

Almost surely, 2^20916029 is an apocalyptic number.

It is an amenable number.

20916029 is a deficient number, since it is larger than the sum of its proper divisors (1).

20916029 is an equidigital number, since it uses as much as digits as its factorization.

20916029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20916029 is about 4573.4045305440. The cubic root of 20916029 is about 275.5241968508.

The spelling of 20916029 in words is "twenty million, nine hundred sixteen thousand, twenty-nine".