20403104220 has 36 divisors (see below), whose sum is σ = 61889416680. Its totient is φ = 5440827744.

The previous prime is 20403104203. The next prime is 20403104221. The reversal of 20403104220 is 2240130402.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 20403104193 and 20403104202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403104221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56675110 + ... + 56675469.

Almost surely, 2^20403104220 is an apocalyptic number.

20403104220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403104220 is an abundant number, since it is smaller than the sum of its proper divisors (41486312460).

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

20403104220 is a wasteful number, since it uses less digits than its factorization.

20403104220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113350594 (or 113350589 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20403104220 its reverse (2240130402), we get a palindrome (22643234622).

The spelling of 20403104220 in words is "twenty billion, four hundred three million, one hundred four thousand, two hundred twenty".