20729145297 has 16 divisors (see below), whose sum is σ = 32183256960. Its totient is φ = 11621730432.

The previous prime is 20729145289. The next prime is 20729145341. The reversal of 20729145297 is 79254192702.

It is not a de Polignac number, because 20729145297 - 2³ = 20729145289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20729145257) 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 15 ways as a sum of consecutive naturals, for example, 9311172 + ... + 9313397.

It is an arithmetic number, because the mean of its divisors is an integer number (2011453560).

Almost surely, 2^20729145297 is an apocalyptic number.

It is an amenable number.

20729145297 is a deficient number, since it is larger than the sum of its proper divisors (11454111663).

20729145297 is a wasteful number, since it uses less digits than its factorization.

20729145297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18624632.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 20729145297 in words is "twenty billion, seven hundred twenty-nine million, one hundred forty-five thousand, two hundred ninety-seven".