21224085480 has 128 divisors (see below), whose sum is σ = 76189075200. Its totient is φ = 5224386816.

The previous prime is 21224085439. The next prime is 21224085499. The reversal of 21224085480 is 8458042212.

21224085480 is a `hidden beast` number, since 2 + 122 + 408 + 54 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 741804 + ... + 769883.

It is an arithmetic number, because the mean of its divisors is an integer number (595227150).

Almost surely, 2^21224085480 is an apocalyptic number.

21224085480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21224085480 is an abundant number, since it is smaller than the sum of its proper divisors (54964989720).

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

21224085480 is a wasteful number, since it uses less digits than its factorization.

21224085480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511720 (or 1511710 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The spelling of 21224085480 in words is "twenty-one billion, two hundred twenty-four million, eighty-five thousand, four hundred eighty".