20404010320 has 40 divisors (see below), whose sum is σ = 49936134240. Its totient is φ = 7732045440.

The previous prime is 20404010279. The next prime is 20404010329. The reversal of 20404010320 is 2301040402.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20404010294 and 20404010303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20404010329) 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, 6710326 + ... + 6713365.

It is an arithmetic number, because the mean of its divisors is an integer number (1248403356).

Almost surely, 2^20404010320 is an apocalyptic number.

20404010320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20404010320 is an abundant number, since it is smaller than the sum of its proper divisors (29532123920).

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

20404010320 is a wasteful number, since it uses less digits than its factorization.

20404010320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13423723 (or 13423717 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20404010320 its reverse (2301040402), we get a palindrome (22705050722).

The spelling of 20404010320 in words is "twenty billion, four hundred four million, ten thousand, three hundred twenty".