20001030 has 128 divisors (see below), whose sum is σ = 59222016. Its totient is φ = 4224000.

The previous prime is 20001029. The next prime is 20001031. The reversal of 20001030 is 3010002.

It is an interprime number because it is at equal distance from previous prime (20001029) and next prime (20001031).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 197980 + ... + 198080.

It is an arithmetic number, because the mean of its divisors is an integer number (462672).

Almost surely, 2^20001030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20001030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29611008).

20001030 is an abundant number, since it is smaller than the sum of its proper divisors (39220986).

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

20001030 is a wasteful number, since it uses less digits than its factorization.

20001030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 20001030 is about 4472.2511110178. The cubic root of 20001030 is about 271.4464213297.

Adding to 20001030 its reverse (3010002), we get a palindrome (23011032).

The spelling of 20001030 in words is "twenty million, one thousand, thirty".