20324104400 has 30 divisors (see below), whose sum is σ = 48828661782. Its totient is φ = 8129641600.

The previous prime is 20324104393. The next prime is 20324104429. The reversal of 20324104400 is 440142302.

It can be written as a sum of positive squares in 3 ways, for example, as 2074255936 + 18249848464 = 45544^2 + 135092^2 .

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

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 5 ways as a sum of consecutive naturals, for example, 25404731 + ... + 25405530.

Almost surely, 2^20324104400 is an apocalyptic number.

20324104400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20324104400 is an abundant number, since it is smaller than the sum of its proper divisors (28504557382).

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

20324104400 is a wasteful number, since it uses less digits than its factorization.

20324104400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50810279 (or 50810268 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20324104400 its reverse (440142302), we get a palindrome (20764246702).

The spelling of 20324104400 in words is "twenty billion, three hundred twenty-four million, one hundred four thousand, four hundred".