20382858 has 48 divisors (see below), whose sum is σ = 47005920. Its totient is φ = 6365088.

The previous prime is 20382833. The next prime is 20382889. The reversal of 20382858 is 85828302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36316 + ... + 36872.

It is an arithmetic number, because the mean of its divisors is an integer number (979290).

Almost surely, 2^20382858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20382858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23502960).

20382858 is an abundant number, since it is smaller than the sum of its proper divisors (26623062).

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

20382858 is a wasteful number, since it uses less digits than its factorization.

20382858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 20382858 is about 4514.7378661446. The cubic root of 20382858 is about 273.1628863306.

The spelling of 20382858 in words is "twenty million, three hundred eighty-two thousand, eight hundred fifty-eight".