20729160 has 96 divisors (see below), whose sum is σ = 68402880. Its totient is φ = 5443200.

The previous prime is 20729131. The next prime is 20729179. The reversal of 20729160 is 6192702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25155 + ... + 25965.

It is an arithmetic number, because the mean of its divisors is an integer number (712530).

Almost surely, 2^20729160 is an apocalyptic number.

20729160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20729160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34201440).

20729160 is an abundant number, since it is smaller than the sum of its proper divisors (47673720).

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

20729160 is a wasteful number, since it uses less digits than its factorization.

20729160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 20729160 is about 4552.9287277532. The cubic root of 20729160 is about 274.7012071538.

The spelling of 20729160 in words is "twenty million, seven hundred twenty-nine thousand, one hundred sixty".