20693589 has 16 divisors (see below), whose sum is σ = 31979520. Its totient is φ = 11657520.

The previous prime is 20693551. The next prime is 20693591. The reversal of 20693589 is 98539602.

It is not a de Polignac number, because 20693589 - 2⁸ = 20693333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20693589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20693509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5449 + ... + 8430.

It is an arithmetic number, because the mean of its divisors is an integer number (1998720).

Almost surely, 2^20693589 is an apocalyptic number.

It is an amenable number.

20693589 is a deficient number, since it is larger than the sum of its proper divisors (11285931).

20693589 is a wasteful number, since it uses less digits than its factorization.

20693589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13960.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 20693589 is about 4549.0206638352. The cubic root of 20693589 is about 274.5439891547.

The spelling of 20693589 in words is "twenty million, six hundred ninety-three thousand, five hundred eighty-nine".