20880177960 has 128 divisors (see below), whose sum is σ = 63074712960. Its totient is φ = 5529600000.

The previous prime is 20880177907. The next prime is 20880177977. The reversal of 20880177960 is 6977108802.

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, 13041160 + ... + 13042760.

It is an arithmetic number, because the mean of its divisors is an integer number (492771195).

Almost surely, 2^20880177960 is an apocalyptic number.

20880177960 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 20880177960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31537356480).

20880177960 is an abundant number, since it is smaller than the sum of its proper divisors (42194535000).

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

20880177960 is a wasteful number, since it uses less digits than its factorization.

20880177960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299 (or 2295 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 20880177960 in words is "twenty billion, eight hundred eighty million, one hundred seventy-seven thousand, nine hundred sixty".