20654329 has 2 divisors, whose sum is σ = 20654330. Its totient is φ = 20654328.

The previous prime is 20654327. The next prime is 20654353. The reversal of 20654329 is 92345602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 8543929 = 3480^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 20654329 - 2¹ = 20654327 is a prime.

Together with 20654327, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20654329.

It is not a weakly prime, because it can be changed into another prime (20654323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10327164 + 10327165.

It is an arithmetic number, because the mean of its divisors is an integer number (10327165).

Almost surely, 2^20654329 is an apocalyptic number.

It is an amenable number.

20654329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20654329 is an equidigital number, since it uses as much as digits as its factorization.

20654329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20654329 is about 4544.7034006632. The cubic root of 20654329 is about 274.3702570773.

The spelling of 20654329 in words is "twenty million, six hundred fifty-four thousand, three hundred twenty-nine".