20389904252928 has 600 divisors, whose sum is σ = 68341517577216. Its totient is φ = 5737807872000.

The previous prime is 20389904252873. The next prime is 20389904252933. The reversal of 20389904252928 is 82925240998302.

20389904252928 is a `hidden beast` number, since 2 + 0 + 3 + 89 + 9 + 0 + 4 + 2 + 529 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106753425313 + ... + 106753425503.

Almost surely, 2^{20389904252928} is an apocalyptic number.

20389904252928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20389904252928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34170758788608).

20389904252928 is an abundant number, since it is smaller than the sum of its proper divisors (47951613324288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20389904252928 is an frugal number, since it uses more digits than its factorization.

20389904252928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 20389904252928 in words is "twenty trillion, three hundred eighty-nine billion, nine hundred four million, two hundred fifty-two thousand, nine hundred twenty-eight".