20829223 has 2 divisors, whose sum is σ = 20829224. Its totient is φ = 20829222.

The previous prime is 20829217. The next prime is 20829227. The reversal of 20829223 is 32292802.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20829223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20829191 and 20829200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20829227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10414611 + 10414612.

It is an arithmetic number, because the mean of its divisors is an integer number (10414612).

Almost surely, 2^20829223 is an apocalyptic number.

20829223 is a deficient number, since it is larger than the sum of its proper divisors (1).

20829223 is an equidigital number, since it uses as much as digits as its factorization.

20829223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20829223 is about 4563.9043592082. The cubic root of 20829223 is about 275.1425068555.

The spelling of 20829223 in words is "twenty million, eight hundred twenty-nine thousand, two hundred twenty-three".