21887704608 has 384 divisors, whose sum is σ = 74573291520. Its totient is φ = 5456056320.

The previous prime is 21887704603. The next prime is 21887704633. The reversal of 21887704608 is 80640778812.

It is a super-3 number, since 3×21887704608³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (21887704603) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21606310 + ... + 21607322.

It is an arithmetic number, because the mean of its divisors is an integer number (194201280).

Almost surely, 2^21887704608 is an apocalyptic number.

21887704608 is a gapful number since it is divisible by the number (28) 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 21887704608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37286645760).

21887704608 is an abundant number, since it is smaller than the sum of its proper divisors (52685586912).

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

21887704608 is a wasteful number, since it uses less digits than its factorization.

21887704608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 51.

The spelling of 21887704608 in words is "twenty-one billion, eight hundred eighty-seven million, seven hundred four thousand, six hundred eight".