20359457 has 2 divisors, whose sum is σ = 20359458. Its totient is φ = 20359456.

The previous prime is 20359441. The next prime is 20359477. The reversal of 20359457 is 75495302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 73441 = 4504^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 20359457 - 2⁴ = 20359441 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20359477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10179728 + 10179729.

It is an arithmetic number, because the mean of its divisors is an integer number (10179729).

Almost surely, 2^20359457 is an apocalyptic number.

It is an amenable number.

20359457 is a deficient number, since it is larger than the sum of its proper divisors (1).

20359457 is an equidigital number, since it uses as much as digits as its factorization.

20359457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 20359457 is about 4512.1454985406. The cubic root of 20359457 is about 273.0583093615.

The spelling of 20359457 in words is "twenty million, three hundred fifty-nine thousand, four hundred fifty-seven".