21127680000 has 780 divisors, whose sum is σ = 87820363488. Its totient is φ = 4792320000.

The previous prime is 21127679999. The next prime is 21127680011. The reversal of 21127680000 is 8672112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 161279935 + ... + 161280065.

Almost surely, 2^21127680000 is an apocalyptic number.

21127680000 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 21127680000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43910181744).

21127680000 is an abundant number, since it is smaller than the sum of its proper divisors (66692683488).

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

21127680000 is an equidigital number, since it uses as much as digits as its factorization.

21127680000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The spelling of 21127680000 in words is "twenty-one billion, one hundred twenty-seven million, six hundred eighty thousand".