20953865082589 has 8 divisors (see below), whose sum is σ = 21000422503040. Its totient is φ = 20907310748256.

The previous prime is 20953865082533. The next prime is 20953865082713. The reversal of 20953865082589 is 98528056835902.

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

It is a cyclic number.

It is not a de Polignac number, because 20953865082589 - 2¹⁹ = 20953864558301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953865082089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13099642 + ... + 14611924.

It is an arithmetic number, because the mean of its divisors is an integer number (2625052812880).

Almost surely, 2^{20953865082589} is an apocalyptic number.

It is an amenable number.

20953865082589 is a deficient number, since it is larger than the sum of its proper divisors (46557420451).

20953865082589 is a wasteful number, since it uses less digits than its factorization.

20953865082589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543059.

The product of its (nonzero) digits is 373248000, while the sum is 70.

The spelling of 20953865082589 in words is "twenty trillion, nine hundred fifty-three billion, eight hundred sixty-five million, eighty-two thousand, five hundred eighty-nine".