20267324928 has 600 divisors, whose sum is σ = 68402485800. Its totient is φ = 5956042752.

The previous prime is 20267324893. The next prime is 20267324993. The reversal of 20267324928 is 82942376202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 227722708 + ... + 227722796.

It is an arithmetic number, because the mean of its divisors is an integer number (114004143).

Almost surely, 2^20267324928 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20267324928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34201242900).

20267324928 is an abundant number, since it is smaller than the sum of its proper divisors (48135160872).

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

20267324928 is an equidigital number, since it uses as much as digits as its factorization.

20267324928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20267324928 in words is "twenty billion, two hundred sixty-seven million, three hundred twenty-four thousand, nine hundred twenty-eight".