20404203320 has 16 divisors (see below), whose sum is σ = 45909457560. Its totient is φ = 8161681312.

The previous prime is 20404203311. The next prime is 20404203359. The reversal of 20404203320 is 2330240402.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20404203292 and 20404203301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255052502 + ... + 255052581.

Almost surely, 2^20404203320 is an apocalyptic number.

20404203320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404203320 is an abundant number, since it is smaller than the sum of its proper divisors (25505254240).

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

20404203320 is a wasteful number, since it uses less digits than its factorization.

20404203320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510105094 (or 510105090 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

Adding to 20404203320 its reverse (2330240402), we get a palindrome (22734443722).

The spelling of 20404203320 in words is "twenty billion, four hundred four million, two hundred three thousand, three hundred twenty".