21468887468 has 12 divisors (see below), whose sum is σ = 42937774992. Its totient is φ = 9200951760.

The previous prime is 21468887423. The next prime is 21468887471. The reversal of 21468887468 is 86478886412.

21468887468 is an admirable number.

It is a super-2 number, since 2×21468887468² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21468887468.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383372963 + ... + 383373018.

It is an arithmetic number, because the mean of its divisors is an integer number (3578147916).

Almost surely, 2^21468887468 is an apocalyptic number.

21468887468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21468887468 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21468887468 is a wasteful number, since it uses less digits than its factorization.

21468887468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766745992 (or 766745990 counting only the distinct ones).

The product of its digits is 33030144, while the sum is 62.

The spelling of 21468887468 in words is "twenty-one billion, four hundred sixty-eight million, eight hundred eighty-seven thousand, four hundred sixty-eight".