20489196 has 96 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 5209344.

The previous prime is 20489191. The next prime is 20489221. The reversal of 20489196 is 69198402.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (20489191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31345 + ... + 31991.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^20489196 is an apocalyptic number.

20489196 is a gapful number since it is divisible by the number (26) 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 20489196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30481920).

20489196 is an abundant number, since it is smaller than the sum of its proper divisors (40474644).

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

20489196 is a wasteful number, since it uses less digits than its factorization.

20489196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 20489196 is about 4526.4993096211. The cubic root of 20489196 is about 273.6370957020.

The spelling of 20489196 in words is "twenty million, four hundred eighty-nine thousand, one hundred ninety-six".