20777472000 has 624 divisors, whose sum is σ = 78139780992. Its totient is φ = 5507481600.

The previous prime is 20777471963. The next prime is 20777472013. The reversal of 20777472000 is 27477702.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 124415917 + ... + 124416083.

It is an arithmetic number, because the mean of its divisors is an integer number (125224008).

Almost surely, 2^20777472000 is an apocalyptic number.

20777472000 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 20777472000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39069890496).

20777472000 is an abundant number, since it is smaller than the sum of its proper divisors (57362308992).

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

20777472000 is an frugal number, since it uses more digits than its factorization.

20777472000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 38416, while the sum is 36.

The spelling of 20777472000 in words is "twenty billion, seven hundred seventy-seven million, four hundred seventy-two thousand".