21624156424 has 32 divisors (see below), whose sum is σ = 45962280000. Its totient is φ = 9455095872.

The previous prime is 21624156419. The next prime is 21624156431. The reversal of 21624156424 is 42465142612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5469724 + ... + 5473675.

It is an arithmetic number, because the mean of its divisors is an integer number (1436321250).

Almost surely, 2^21624156424 is an apocalyptic number.

It is an amenable number.

21624156424 is an abundant number, since it is smaller than the sum of its proper divisors (24338123576).

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

21624156424 is a wasteful number, since it uses less digits than its factorization.

21624156424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10943437 (or 10943433 counting only the distinct ones).

The product of its digits is 92160, while the sum is 37.

The spelling of 21624156424 in words is "twenty-one billion, six hundred twenty-four million, one hundred fifty-six thousand, four hundred twenty-four".