20389637396 has 18 divisors (see below), whose sum is σ = 35927483550. Its totient is φ = 10124665792.

The previous prime is 20389637383. The next prime is 20389637417. The reversal of 20389637396 is 69373698302.

It can be written as a sum of positive squares in 3 ways, for example, as 1795600 + 20387841796 = 1340^2 + 142786^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3483080 + ... + 3488928.

Almost surely, 2^20389637396 is an apocalyptic number.

It is an amenable number.

20389637396 is a deficient number, since it is larger than the sum of its proper divisors (15537846154).

20389637396 is an frugal number, since it uses more digits than its factorization.

20389637396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11851 (or 6000 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 56.

The spelling of 20389637396 in words is "twenty billion, three hundred eighty-nine million, six hundred thirty-seven thousand, three hundred ninety-six".