20829313 has 2 divisors, whose sum is σ = 20829314. Its totient is φ = 20829312.

The previous prime is 20829269. The next prime is 20829317. The reversal of 20829313 is 31392802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20178064 + 651249 = 4492^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 20829313 - 2¹⁷ = 20698241 is a prime.

It is not a weakly prime, because it can be changed into another prime (20829317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10414656 + 10414657.

It is an arithmetic number, because the mean of its divisors is an integer number (10414657).

Almost surely, 2^20829313 is an apocalyptic number.

It is an amenable number.

20829313 is a deficient number, since it is larger than the sum of its proper divisors (1).

20829313 is an equidigital number, since it uses as much as digits as its factorization.

20829313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20829313 is about 4563.9142191763. The cubic root of 20829313 is about 275.1429031383.

The spelling of 20829313 in words is "twenty million, eight hundred twenty-nine thousand, three hundred thirteen".