20001102 has 32 divisors (see below), whose sum is σ = 43908480. Its totient is φ = 6023520.

The previous prime is 20001083. The next prime is 20001139. The reversal of 20001102 is 20110002.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10968 + ... + 12660.

It is an arithmetic number, because the mean of its divisors is an integer number (1372140).

Almost surely, 2^20001102 is an apocalyptic number.

20001102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20001102 is an abundant number, since it is smaller than the sum of its proper divisors (23907378).

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

20001102 is a wasteful number, since it uses less digits than its factorization.

20001102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20001102 is about 4472.2591606480. The cubic root of 20001102 is about 271.4467470483.

Adding to 20001102 its reverse (20110002), we get a palindrome (40111104).

Subtracting 20001102 from its reverse (20110002), we obtain a square (108900 = 330²).

The spelling of 20001102 in words is "twenty million, one thousand, one hundred two".