20328210 has 96 divisors (see below), whose sum is σ = 61955712. Its totient is φ = 4527360.

The previous prime is 20328167. The next prime is 20328221. The reversal of 20328210 is 1282302.

It is a happy number.

It is a super-2 number, since 2×20328210² = 826472243608200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25437 + ... + 26223.

It is an arithmetic number, because the mean of its divisors is an integer number (645372).

Almost surely, 2^20328210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20328210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30977856).

20328210 is an abundant number, since it is smaller than the sum of its proper divisors (41627502).

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

20328210 is a wasteful number, since it uses less digits than its factorization.

20328210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20328210 is about 4508.6816254865. The cubic root of 20328210 is about 272.9185443092.

The spelling of 20328210 in words is "twenty million, three hundred twenty-eight thousand, two hundred ten".