20247593 has 2 divisors, whose sum is σ = 20247594. Its totient is φ = 20247592.

The previous prime is 20247541. The next prime is 20247607. The reversal of 20247593 is 39574202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19386409 + 861184 = 4403^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 20247593 - 2⁶ = 20247529 is a prime.

It is not a weakly prime, because it can be changed into another prime (20247523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123796 + 10123797.

It is an arithmetic number, because the mean of its divisors is an integer number (10123797).

Almost surely, 2^20247593 is an apocalyptic number.

It is an amenable number.

20247593 is a deficient number, since it is larger than the sum of its proper divisors (1).

20247593 is an equidigital number, since it uses as much as digits as its factorization.

20247593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20247593 is about 4499.7325476077. The cubic root of 20247593 is about 272.5572889678.

The spelling of 20247593 in words is "twenty million, two hundred forty-seven thousand, five hundred ninety-three".