20998038593 has 8 divisors (see below), whose sum is σ = 24005152512. Its totient is φ = 17992773216.

The previous prime is 20998038569. The next prime is 20998038619. The reversal of 20998038593 is 39583089902.

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 20998038593 - 2¹⁶ = 20997973057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20998038553) 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, 437705 + ... + 483302.

It is an arithmetic number, because the mean of its divisors is an integer number (3000644064).

Almost surely, 2^20998038593 is an apocalyptic number.

It is an amenable number.

20998038593 is a deficient number, since it is larger than the sum of its proper divisors (3007113919).

20998038593 is an equidigital number, since it uses as much as digits as its factorization.

20998038593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924271.

The product of its (nonzero) digits is 4199040, while the sum is 56.

Adding to 20998038593 its sum of digits (56), we get a square (20998038649 = 144907²).

The spelling of 20998038593 in words is "twenty billion, nine hundred ninety-eight million, thirty-eight thousand, five hundred ninety-three".