20328030 has 32 divisors (see below), whose sum is σ = 54208800. Its totient is φ = 5420736.

The previous prime is 20328029. The next prime is 20328041. The reversal of 20328030 is 3082302.

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

It is a junction number, because it is equal to n+sod(n) for n = 20327994 and 20328012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37375 + ... + 37914.

It is an arithmetic number, because the mean of its divisors is an integer number (1694025).

Almost surely, 2^20328030 is an apocalyptic number.

20328030 is an abundant number, since it is smaller than the sum of its proper divisors (33880770).

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

20328030 is a wasteful number, since it uses less digits than its factorization.

20328030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75305 (or 75299 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20328030 is about 4508.6616639531. The cubic root of 20328030 is about 272.9177387704.

The spelling of 20328030 in words is "twenty million, three hundred twenty-eight thousand, thirty".