20452357 has 2 divisors, whose sum is σ = 20452358. Its totient is φ = 20452356.

The previous prime is 20452307. The next prime is 20452363. The reversal of 20452357 is 75325402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12152196 + 8300161 = 3486^2 + 2881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20452357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20452307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226178 + 10226179.

It is an arithmetic number, because the mean of its divisors is an integer number (10226179).

Almost surely, 2^20452357 is an apocalyptic number.

It is an amenable number.

20452357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20452357 is an equidigital number, since it uses as much as digits as its factorization.

20452357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 20452357 is about 4522.4282194414. The cubic root of 20452357 is about 273.4730000407.

Adding to 20452357 its reverse (75325402), we get a palindrome (95777759).

The spelling of 20452357 in words is "twenty million, four hundred fifty-two thousand, three hundred fifty-seven".