20218346880 has 256 divisors, whose sum is σ = 70790284800. Its totient is φ = 4885512192.

The previous prime is 20218346873. The next prime is 20218346923. The reversal of 20218346880 is 8864381202.

It is a happy number.

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 31 ways as a sum of consecutive naturals, for example, 826992 + ... + 851088.

It is an arithmetic number, because the mean of its divisors is an integer number (276524550).

Almost surely, 2^20218346880 is an apocalyptic number.

20218346880 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 20218346880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35395142400).

20218346880 is an abundant number, since it is smaller than the sum of its proper divisors (50571937920).

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

20218346880 is a wasteful number, since it uses less digits than its factorization.

20218346880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24161 (or 24149 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 20218346880 in words is "twenty billion, two hundred eighteen million, three hundred forty-six thousand, eight hundred eighty".