21332607960 has 128 divisors (see below), whose sum is σ = 67522752000. Its totient is φ = 5376761856.

The previous prime is 21332607953. The next prime is 21332607973. The reversal of 21332607960 is 6970623312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 990264 + ... + 1011576.

It is an arithmetic number, because the mean of its divisors is an integer number (527521500).

Almost surely, 2^21332607960 is an apocalyptic number.

21332607960 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 21332607960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33761376000).

21332607960 is an abundant number, since it is smaller than the sum of its proper divisors (46190144040).

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

21332607960 is a wasteful number, since it uses less digits than its factorization.

21332607960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21785 (or 21781 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The spelling of 21332607960 in words is "twenty-one billion, three hundred thirty-two million, six hundred seven thousand, nine hundred sixty".