20604236800 has 264 divisors, whose sum is σ = 60268920320. Its totient is φ = 6834585600.

The previous prime is 20604236777. The next prime is 20604236813. The reversal of 20604236800 is 863240602.

It is a super-2 number, since 2×20604236800² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5553346 + ... + 5557054.

Almost surely, 2^20604236800 is an apocalyptic number.

20604236800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20604236800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30134460160).

20604236800 is an abundant number, since it is smaller than the sum of its proper divisors (39664683520).

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

20604236800 is a wasteful number, since it uses less digits than its factorization.

20604236800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777 (or 3754 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The spelling of 20604236800 in words is "twenty billion, six hundred four million, two hundred thirty-six thousand, eight hundred".