20313888 has 192 divisors, whose sum is σ = 67415040. Its totient is φ = 5225472.

The previous prime is 20313871. The next prime is 20313913. The reversal of 20313888 is 88831302.

It is a congruent number.

It is an unprimeable number.

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, 472395 + ... + 472437.

It is an arithmetic number, because the mean of its divisors is an integer number (351120).

Almost surely, 2^20313888 is an apocalyptic number.

20313888 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 20313888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33707520).

20313888 is an abundant number, since it is smaller than the sum of its proper divisors (47101152).

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

20313888 is a wasteful number, since it uses less digits than its factorization.

20313888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 20313888 is about 4507.0930764740. The cubic root of 20313888 is about 272.8544354066.

The spelling of 20313888 in words is "twenty million, three hundred thirteen thousand, eight hundred eighty-eight".