20068864 has 40 divisors (see below), whose sum is σ = 42229440. Its totient is φ = 9501696.

The previous prime is 20068849. The next prime is 20068871. The reversal of 20068864 is 46886002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8697 + ... + 10759.

It is an arithmetic number, because the mean of its divisors is an integer number (1055736).

Almost surely, 2^20068864 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 20068864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21114720).

20068864 is an abundant number, since it is smaller than the sum of its proper divisors (22160576).

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

20068864 is an equidigital number, since it uses as much as digits as its factorization.

20068864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100 (or 2084 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 20068864 is about 4479.8285681486. The cubic root of 20068864 is about 271.7529475318.

The spelling of 20068864 in words is "twenty million, sixty-eight thousand, eight hundred sixty-four".