20954589 has 8 divisors (see below), whose sum is σ = 28084992. Its totient is φ = 13896960.

The previous prime is 20954581. The next prime is 20954627. The reversal of 20954589 is 98545902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20954589 - 2³ = 20954581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20954589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20954581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17517 + ... + 18674.

It is an arithmetic number, because the mean of its divisors is an integer number (3510624).

Almost surely, 2^20954589 is an apocalyptic number.

It is an amenable number.

20954589 is a deficient number, since it is larger than the sum of its proper divisors (7130403).

20954589 is a wasteful number, since it uses less digits than its factorization.

20954589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36387.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 20954589 is about 4577.6182671778. The cubic root of 20954589 is about 275.6934082391.

The spelling of 20954589 in words is "twenty million, nine hundred fifty-four thousand, five hundred eighty-nine".