20452304357 has 2 divisors, whose sum is σ = 20452304358. Its totient is φ = 20452304356.

The previous prime is 20452304351. The next prime is 20452304381. The reversal of 20452304357 is 75340325402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17479219681 + 2973084676 = 132209^2 + 54526^2 .

It is a cyclic number.

It is not a de Polignac number, because 20452304357 - 2⁶ = 20452304293 is a prime.

It is a super-2 number, since 2×20452304357² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20452304351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226152178 + 10226152179.

It is an arithmetic number, because the mean of its divisors is an integer number (10226152179).

Almost surely, 2^20452304357 is an apocalyptic number.

It is an amenable number.

20452304357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20452304357 is an equidigital number, since it uses as much as digits as its factorization.

20452304357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 35.

Adding to 20452304357 its reverse (75340325402), we get a palindrome (95792629759).

The spelling of 20452304357 in words is "twenty billion, four hundred fifty-two million, three hundred four thousand, three hundred fifty-seven".