20052457 has 2 divisors, whose sum is σ = 20052458. Its totient is φ = 20052456.

The previous prime is 20052437. The next prime is 20052463. The reversal of 20052457 is 75425002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15968016 + 4084441 = 3996^2 + 2021^2 .

It is a cyclic number.

It is not a de Polignac number, because 20052457 - 2¹⁹ = 19528169 is a prime.

It is not a weakly prime, because it can be changed into another prime (20052407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026228 + 10026229.

It is an arithmetic number, because the mean of its divisors is an integer number (10026229).

Almost surely, 2^20052457 is an apocalyptic number.

It is an amenable number.

20052457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20052457 is an equidigital number, since it uses as much as digits as its factorization.

20052457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20052457 is about 4477.9969852603. The cubic root of 20052457 is about 271.6788714872.

Adding to 20052457 its reverse (75425002), we get a palindrome (95477459).

The spelling of 20052457 in words is "twenty million, fifty-two thousand, four hundred fifty-seven".