21382556132 has 24 divisors (see below), whose sum is σ = 43048333440. Its totient is φ = 9103262400.

The previous prime is 21382556099. The next prime is 21382556137. The reversal of 21382556132 is 23165528312.

It is not an unprimeable number, because it can be changed into a prime (21382556137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2524457 + ... + 2532912.

It is an arithmetic number, because the mean of its divisors is an integer number (1793680560).

Almost surely, 2^21382556132 is an apocalyptic number.

It is an amenable number.

21382556132 is an abundant number, since it is smaller than the sum of its proper divisors (21665777308).

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

21382556132 is a wasteful number, since it uses less digits than its factorization.

21382556132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057531 (or 5057529 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The spelling of 21382556132 in words is "twenty-one billion, three hundred eighty-two million, five hundred fifty-six thousand, one hundred thirty-two".