20729580479 has 16 divisors (see below), whose sum is σ = 22170931200. Its totient is φ = 19313172864.

The previous prime is 20729580463. The next prime is 20729580491. The reversal of 20729580479 is 97408592702.

It is not a de Polignac number, because 20729580479 - 2⁴ = 20729580463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20729580479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729580409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2941442 + ... + 2948480.

It is an arithmetic number, because the mean of its divisors is an integer number (1385683200).

Almost surely, 2^20729580479 is an apocalyptic number.

20729580479 is a deficient number, since it is larger than the sum of its proper divisors (1441350721).

20729580479 is a wasteful number, since it uses less digits than its factorization.

20729580479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8782.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 20729580479 in words is "twenty billion, seven hundred twenty-nine million, five hundred eighty thousand, four hundred seventy-nine".