21484144156 has 24 divisors (see below), whose sum is σ = 39089118096. Its totient is φ = 10323646080.

The previous prime is 21484144147. The next prime is 21484144159. The reversal of 21484144156 is 65144148412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484144159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966631 + ... + 988606.

It is an arithmetic number, because the mean of its divisors is an integer number (1628713254).

Almost surely, 2^21484144156 is an apocalyptic number.

It is an amenable number.

21484144156 is a deficient number, since it is larger than the sum of its proper divisors (17604973940).

21484144156 is a wasteful number, since it uses less digits than its factorization.

21484144156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955349 (or 1955347 counting only the distinct ones).

The product of its digits is 122880, while the sum is 40.

The spelling of 21484144156 in words is "twenty-one billion, four hundred eighty-four million, one hundred forty-four thousand, one hundred fifty-six".