20673554880 has 224 divisors, whose sum is σ = 72012291840. Its totient is φ = 4983316480.

The previous prime is 20673554879. The next prime is 20673554911. The reversal of 20673554880 is 8845537602.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1884772 + ... + 1895708.

Almost surely, 2^20673554880 is an apocalyptic number.

20673554880 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 20673554880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36006145920).

20673554880 is an abundant number, since it is smaller than the sum of its proper divisors (51338736960).

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

20673554880 is a wasteful number, since it uses less digits than its factorization.

20673554880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11147 (or 11137 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 20673554880 in words is "twenty billion, six hundred seventy-three million, five hundred fifty-four thousand, eight hundred eighty".