20589697 has 4 divisors (see below), whose sum is σ = 20643840. Its totient is φ = 20535556.

The previous prime is 20589677. The next prime is 20589707. The reversal of 20589697 is 79698502.

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 20589697 - 2¹¹ = 20587649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20589607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26497 + ... + 27262.

It is an arithmetic number, because the mean of its divisors is an integer number (5160960).

Almost surely, 2^20589697 is an apocalyptic number.

It is an amenable number.

20589697 is a deficient number, since it is larger than the sum of its proper divisors (54143).

20589697 is an equidigital number, since it uses as much as digits as its factorization.

20589697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54142.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 20589697 is about 4537.5871341496. The cubic root of 20589697 is about 274.0837694744.

The spelling of 20589697 in words is "twenty million, five hundred eighty-nine thousand, six hundred ninety-seven".