20002969728 has 768 divisors, whose sum is σ = 73322496000. Its totient is φ = 5215795200.

The previous prime is 20002969691. The next prime is 20002969781. The reversal of 20002969728 is 82796920002.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 281731933 + ... + 281732003.

It is an arithmetic number, because the mean of its divisors is an integer number (95472000).

Almost surely, 2^20002969728 is an apocalyptic number.

20002969728 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 20002969728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36661248000).

20002969728 is an abundant number, since it is smaller than the sum of its proper divisors (53319526272).

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

20002969728 is a wasteful number, since it uses less digits than its factorization.

20002969728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 20002969728 in words is "twenty billion, two million, nine hundred sixty-nine thousand, seven hundred twenty-eight".