20906329 has 2 divisors, whose sum is σ = 20906330. Its totient is φ = 20906328.

The previous prime is 20906317. The next prime is 20906341. The reversal of 20906329 is 92360902.

It is a balanced prime because it is at equal distance from previous prime (20906317) and next prime (20906341).

It can be written as a sum of positive squares in only one way, i.e., 17239104 + 3667225 = 4152^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 20906329 - 2⁵ = 20906297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20906329.

It is not a weakly prime, because it can be changed into another prime (20906629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10453164 + 10453165.

It is an arithmetic number, because the mean of its divisors is an integer number (10453165).

Almost surely, 2^20906329 is an apocalyptic number.

It is an amenable number.

20906329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20906329 is an equidigital number, since it uses as much as digits as its factorization.

20906329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 20906329 is about 4572.3439284463. The cubic root of 20906329 is about 275.4815979751.

The spelling of 20906329 in words is "twenty million, nine hundred six thousand, three hundred twenty-nine".