20442328229929 has 2 divisors, whose sum is σ = 20442328229930. Its totient is φ = 20442328229928.

The previous prime is 20442328229899. The next prime is 20442328230019. The reversal of 20442328229929 is 92992282324402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19733451795225 + 708876434704 = 4442235^2 + 841948^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442328229929 - 2¹³ = 20442328221737 is a prime.

It is not a weakly prime, because it can be changed into another prime (20442328629929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221164114964 + 10221164114965.

It is an arithmetic number, because the mean of its divisors is an integer number (10221164114965).

Almost surely, 2^{20442328229929} is an apocalyptic number.

It is an amenable number.

20442328229929 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442328229929 is an equidigital number, since it uses as much as digits as its factorization.

20442328229929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 58.

The spelling of 20442328229929 in words is "twenty trillion, four hundred forty-two billion, three hundred twenty-eight million, two hundred twenty-nine thousand, nine hundred twenty-nine".