21913986288000 has 128 divisors (see below), whose sum is σ = 72644864703840. Its totient is φ = 5843729664000.

The previous prime is 21913986287989. The next prime is 21913986288001. The reversal of 21913986288000 is 88268931912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21913986288001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228222691 + ... + 228318690.

Almost surely, 2^{21913986288000} is an apocalyptic number.

21913986288000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21913986288000 is an abundant number, since it is smaller than the sum of its proper divisors (50730878415840).

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

21913986288000 is an equidigital number, since it uses as much as digits as its factorization.

21913986288000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456541413 (or 456541391 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 57.

The spelling of 21913986288000 in words is "twenty-one trillion, nine hundred thirteen billion, nine hundred eighty-six million, two hundred eighty-eight thousand".