20729088 has 72 divisors (see below), whose sum is σ = 61320000. Its totient is φ = 6907392.

The previous prime is 20729087. The next prime is 20729099. The reversal of 20729088 is 88092702.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20729087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5413 + ... + 8411.

Almost surely, 2^20729088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20729088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30660000).

20729088 is an abundant number, since it is smaller than the sum of its proper divisors (40590912).

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

20729088 is an equidigital number, since it uses as much as digits as its factorization.

20729088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024 (or 3004 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 20729088 is about 4552.9208207479. The cubic root of 20729088 is about 274.7008891073.

The spelling of 20729088 in words is "twenty million, seven hundred twenty-nine thousand, eighty-eight".