20468868 has 48 divisors (see below), whose sum is σ = 55708800. Its totient is φ = 5847072.

The previous prime is 20468863. The next prime is 20468869. The reversal of 20468868 is 86886402.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (20468863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1630 + ... + 6602.

It is an arithmetic number, because the mean of its divisors is an integer number (1160600).

Almost surely, 2^20468868 is an apocalyptic number.

20468868 is a gapful number since it is divisible by the number (28) 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 20468868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27854400).

20468868 is an abundant number, since it is smaller than the sum of its proper divisors (35239932).

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

20468868 is a wasteful number, since it uses less digits than its factorization.

20468868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001 (or 4985 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 20468868 is about 4524.2533085582. The cubic root of 20468868 is about 273.5465709937.

The spelling of 20468868 in words is "twenty million, four hundred sixty-eight thousand, eight hundred sixty-eight".