20031102 has 72 divisors (see below), whose sum is σ = 54401256. Its totient is φ = 5279904.

The previous prime is 20031101. The next prime is 20031103. The reversal of 20031102 is 20113002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20031101) and next prime (20031103).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10593 + ... + 12339.

It is an arithmetic number, because the mean of its divisors is an integer number (755573).

Almost surely, 2^20031102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20031102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27200628).

20031102 is an abundant number, since it is smaller than the sum of its proper divisors (34370154).

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

20031102 is a wasteful number, since it uses less digits than its factorization.

20031102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1782 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20031102 is about 4475.6119134706. The cubic root of 20031102 is about 271.5823951461.

Adding to 20031102 its reverse (20113002), we get a palindrome (40144104).

The spelling of 20031102 in words is "twenty million, thirty-one thousand, one hundred two".