20464229 has 2 divisors, whose sum is σ = 20464230. Its totient is φ = 20464228.

The previous prime is 20464217. The next prime is 20464237. The reversal of 20464229 is 92246402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11404129 + 9060100 = 3377^2 + 3010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20464229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20464529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232114 + 10232115.

It is an arithmetic number, because the mean of its divisors is an integer number (10232115).

Almost surely, 2^20464229 is an apocalyptic number.

It is an amenable number.

20464229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20464229 is an equidigital number, since it uses as much as digits as its factorization.

20464229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20464229 is about 4523.7405982218. The cubic root of 20464229 is about 273.5259041870.

The spelling of 20464229 in words is "twenty million, four hundred sixty-four thousand, two hundred twenty-nine".