20289593 has 12 divisors (see below), whose sum is σ = 21496464. Its totient is φ = 19139400.

The previous prime is 20289583. The next prime is 20289623. The reversal of 20289593 is 39598202.

It is not a de Polignac number, because 20289593 - 2⁸ = 20289337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20289523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41078 + ... + 41568.

It is an arithmetic number, because the mean of its divisors is an integer number (1791372).

Almost surely, 2^20289593 is an apocalyptic number.

It is an amenable number.

20289593 is a deficient number, since it is larger than the sum of its proper divisors (1206871).

20289593 is an equidigital number, since it uses as much as digits as its factorization.

20289593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596 (or 565 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 20289593 is about 4504.3970739712. The cubic root of 20289593 is about 272.7456158807.

The spelling of 20289593 in words is "twenty million, two hundred eighty-nine thousand, five hundred ninety-three".