21326286480 has 160 divisors (see below), whose sum is σ = 70536521088. Its totient is φ = 5311488000.

The previous prime is 21326286473. The next prime is 21326286511. The reversal of 21326286480 is 8468262312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 514530 + ... + 554430.

Almost surely, 2^21326286480 is an apocalyptic number.

21326286480 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 21326286480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35268260544).

21326286480 is an abundant number, since it is smaller than the sum of its proper divisors (49210234608).

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

21326286480 is a wasteful number, since it uses less digits than its factorization.

21326286480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40065 (or 40059 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The spelling of 21326286480 in words is "twenty-one billion, three hundred twenty-six million, two hundred eighty-six thousand, four hundred eighty".