20448728733 has 32 divisors (see below), whose sum is σ = 29185833600. Its totient is φ = 12711638016.

The previous prime is 20448728723. The next prime is 20448728743. The reversal of 20448728733 is 33782784402.

It is an interprime number because it is at equal distance from previous prime (20448728723) and next prime (20448728743).

It is not a de Polignac number, because 20448728733 - 2¹⁸ = 20448466589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20448728723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 302241 + ... + 363657.

It is an arithmetic number, because the mean of its divisors is an integer number (912057300).

Almost surely, 2^20448728733 is an apocalyptic number.

It is an amenable number.

20448728733 is a deficient number, since it is larger than the sum of its proper divisors (8737104867).

20448728733 is a wasteful number, since it uses less digits than its factorization.

20448728733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61581.

The product of its (nonzero) digits is 1806336, while the sum is 48.

The spelling of 20448728733 in words is "twenty billion, four hundred forty-eight million, seven hundred twenty-eight thousand, seven hundred thirty-three".