20452864429 has 2 divisors, whose sum is σ = 20452864430. Its totient is φ = 20452864428.

The previous prime is 20452864363. The next prime is 20452864433. The reversal of 20452864429 is 92446825402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18558612900 + 1894251529 = 136230^2 + 43523^2 .

It is a cyclic number.

It is not a de Polignac number, because 20452864429 - 2⁹ = 20452863917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20452864489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226432214 + 10226432215.

It is an arithmetic number, because the mean of its divisors is an integer number (10226432215).

Almost surely, 2^20452864429 is an apocalyptic number.

It is an amenable number.

20452864429 is a deficient number, since it is larger than the sum of its proper divisors (1).

20452864429 is an equidigital number, since it uses as much as digits as its factorization.

20452864429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 20452864429 in words is "twenty billion, four hundred fifty-two million, eight hundred sixty-four thousand, four hundred twenty-nine".