20730726747 has 6 divisors (see below), whose sum is σ = 29944383092. Its totient is φ = 13820484492.

The previous prime is 20730726727. The next prime is 20730726769. The reversal of 20730726747 is 74762703702.

It is not a de Polignac number, because 20730726747 - 2⁸ = 20730726491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20730726727) 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 5 ways as a sum of consecutive naturals, for example, 1151707033 + ... + 1151707050.

Almost surely, 2^20730726747 is an apocalyptic number.

20730726747 is a deficient number, since it is larger than the sum of its proper divisors (9213656345).

20730726747 is a wasteful number, since it uses less digits than its factorization.

20730726747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303414089 (or 2303414086 counting only the distinct ones).

The product of its (nonzero) digits is 691488, while the sum is 45.

The spelling of 20730726747 in words is "twenty billion, seven hundred thirty million, seven hundred twenty-six thousand, seven hundred forty-seven".