20131002032220 has 96 divisors (see below), whose sum is σ = 62673614203200. Its totient is φ = 5364510342912.

The previous prime is 20131002032213. The next prime is 20131002032221. The reversal of 20131002032220 is 2223020013102.

20131002032220 is a `hidden beast` number, since 201 + 3 + 100 + 20 + 322 + 20 = 666.

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 = 20131002032193 and 20131002032202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131002032221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12272299 + ... + 13815618.

It is an arithmetic number, because the mean of its divisors is an integer number (652850147950).

Almost surely, 2^{20131002032220} is an apocalyptic number.

20131002032220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20131002032220 is an abundant number, since it is smaller than the sum of its proper divisors (42542612170980).

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

20131002032220 is a wasteful number, since it uses less digits than its factorization.

20131002032220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26089364 (or 26089356 counting only the distinct ones).

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

Adding to 20131002032220 its reverse (2223020013102), we get a palindrome (22354022045322).

The spelling of 20131002032220 in words is "twenty trillion, one hundred thirty-one billion, two million, thirty-two thousand, two hundred twenty".