20404224320 has 56 divisors (see below), whose sum is σ = 48859135200. Its totient is φ = 8116070912.

The previous prime is 20404224293. The next prime is 20404224329. The reversal of 20404224320 is 2342240402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404224329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120830 + ... + 235389.

Almost surely, 2^20404224320 is an apocalyptic number.

20404224320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404224320 is an abundant number, since it is smaller than the sum of its proper divisors (28454910880).

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

20404224320 is a wasteful number, since it uses less digits than its factorization.

20404224320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356415 (or 356405 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

Adding to 20404224320 its reverse (2342240402), we get a palindrome (22746464722).

The spelling of 20404224320 in words is "twenty billion, four hundred four million, two hundred twenty-four thousand, three hundred twenty".