20089860 has 96 divisors (see below), whose sum is σ = 66404352. Its totient is φ = 4440960.

The previous prime is 20089843. The next prime is 20089871. The reversal of 20089860 is 6898002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12249 + ... + 13791.

It is an arithmetic number, because the mean of its divisors is an integer number (691712).

Almost surely, 2^20089860 is an apocalyptic number.

20089860 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 20089860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33202176).

20089860 is an abundant number, since it is smaller than the sum of its proper divisors (46314492).

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

20089860 is a wasteful number, since it uses less digits than its factorization.

20089860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593 (or 1591 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20089860 is about 4482.1713487996. The cubic root of 20089860 is about 271.8476836077.

The spelling of 20089860 in words is "twenty million, eighty-nine thousand, eight hundred sixty".