20258888 has 32 divisors (see below), whose sum is σ = 41247360. Its totient is φ = 9272640.

The previous prime is 20258873. The next prime is 20258897. The reversal of 20258888 is 88885202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12881 + ... + 14367.

It is an arithmetic number, because the mean of its divisors is an integer number (1288980).

Almost surely, 2^20258888 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 20258888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20623680).

20258888 is an abundant number, since it is smaller than the sum of its proper divisors (20988472).

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

20258888 is a wasteful number, since it uses less digits than its factorization.

20258888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 41.

The square root of 20258888 is about 4500.9874472164. The cubic root of 20258888 is about 272.6079610372.

The spelling of 20258888 in words is "twenty million, two hundred fifty-eight thousand, eight hundred eighty-eight".