20159760 has 80 divisors (see below), whose sum is σ = 65799360. Its totient is φ = 5091840.

The previous prime is 20159749. The next prime is 20159761. The reversal of 20159760 is 6795102.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (20159761) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2350 + ... + 6770.

It is an arithmetic number, because the mean of its divisors is an integer number (822492).

Almost surely, 2^20159760 is an apocalyptic number.

20159760 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 20159760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32899680).

20159760 is an abundant number, since it is smaller than the sum of its proper divisors (45639600).

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

20159760 is a wasteful number, since it uses less digits than its factorization.

20159760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4456 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 20159760 is about 4489.9621379250. The cubic root of 20159760 is about 272.1626046192.

The spelling of 20159760 in words is "twenty million, one hundred fifty-nine thousand, seven hundred sixty".