20648967389 has 8 divisors (see below), whose sum is σ = 20780887512. Its totient is φ = 20517192000.

The previous prime is 20648967373. The next prime is 20648967419. The reversal of 20648967389 is 98376984602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8223406489 + 12425560900 = 90683^2 + 111470^2 .

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 20648967389 - 2⁴ = 20648967373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20648967319) 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, 257639 + ... + 328139.

It is an arithmetic number, because the mean of its divisors is an integer number (2597610939).

Almost surely, 2^20648967389 is an apocalyptic number.

It is an amenable number.

20648967389 is a deficient number, since it is larger than the sum of its proper divisors (131920123).

20648967389 is a wasteful number, since it uses less digits than its factorization.

20648967389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72367.

The product of its (nonzero) digits is 31352832, while the sum is 62.

The spelling of 20648967389 in words is "twenty billion, six hundred forty-eight million, nine hundred sixty-seven thousand, three hundred eighty-nine".