20630593 has 4 divisors (see below), whose sum is σ = 21296128. Its totient is φ = 19965060.

The previous prime is 20630587. The next prime is 20630611. The reversal of 20630593 is 39503602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20630593 - 2¹³ = 20622401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20630543) 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 in 3 ways as a sum of consecutive naturals, for example, 332721 + ... + 332782.

It is an arithmetic number, because the mean of its divisors is an integer number (5324032).

Almost surely, 2^20630593 is an apocalyptic number.

It is an amenable number.

20630593 is a deficient number, since it is larger than the sum of its proper divisors (665535).

20630593 is an equidigital number, since it uses as much as digits as its factorization.

20630593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665534.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 20630593 is about 4542.0912584403. The cubic root of 20630593 is about 274.2651144908.

The spelling of 20630593 in words is "twenty million, six hundred thirty thousand, five hundred ninety-three".