20729089398 has 32 divisors (see below), whose sum is σ = 42320318976. Its totient is φ = 6767199648.

The previous prime is 20729089391. The next prime is 20729089429. The reversal of 20729089398 is 89398092702.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729089391) 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, 79486 + ... + 218577.

It is an arithmetic number, because the mean of its divisors is an integer number (1322509968).

Almost surely, 2^20729089398 is an apocalyptic number.

20729089398 is an abundant number, since it is smaller than the sum of its proper divisors (21591229578).

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

20729089398 is a wasteful number, since it uses less digits than its factorization.

20729089398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298308.

The product of its (nonzero) digits is 3919104, while the sum is 57.

The spelling of 20729089398 in words is "twenty billion, seven hundred twenty-nine million, eighty-nine thousand, three hundred ninety-eight".