21219236160 has 112 divisors (see below), whose sum is σ = 67400424000. Its totient is φ = 5655998464.

The previous prime is 21219236149. The next prime is 21219236161. The reversal of 21219236160 is 6163291212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21219236161) 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, 3624916 + ... + 3630764.

It is an arithmetic number, because the mean of its divisors is an integer number (601789500).

Almost surely, 2^21219236160 is an apocalyptic number.

21219236160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21219236160 is an abundant number, since it is smaller than the sum of its proper divisors (46181187840).

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

21219236160 is a wasteful number, since it uses less digits than its factorization.

21219236160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648 (or 9638 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The spelling of 21219236160 in words is "twenty-one billion, two hundred nineteen million, two hundred thirty-six thousand, one hundred sixty".