20248457 has 2 divisors, whose sum is σ = 20248458. Its totient is φ = 20248456.

The previous prime is 20248451. The next prime is 20248477. The reversal of 20248457 is 75484202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11182336 + 9066121 = 3344^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 20248457 - 2¹² = 20244361 is a prime.

It is not a weakly prime, because it can be changed into another prime (20248451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10124228 + 10124229.

It is an arithmetic number, because the mean of its divisors is an integer number (10124229).

Almost surely, 2^20248457 is an apocalyptic number.

It is an amenable number.

20248457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20248457 is an equidigital number, since it uses as much as digits as its factorization.

20248457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 20248457 is about 4499.8285522895. The cubic root of 20248457 is about 272.5611657439.

The spelling of 20248457 in words is "twenty million, two hundred forty-eight thousand, four hundred fifty-seven".