21332555144 has 32 divisors (see below), whose sum is σ = 40896576000. Its totient is φ = 10427324160.

The previous prime is 21332555141. The next prime is 21332555147. The reversal of 21332555144 is 44155523312.

It is an interprime number because it is at equal distance from previous prime (21332555141) and next prime (21332555147).

It is not an unprimeable number, because it can be changed into a prime (21332555141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299057 + ... + 363455.

It is an arithmetic number, because the mean of its divisors is an integer number (1278018000).

Almost surely, 2^21332555144 is an apocalyptic number.

It is an amenable number.

21332555144 is a deficient number, since it is larger than the sum of its proper divisors (19564020856).

21332555144 is a wasteful number, since it uses less digits than its factorization.

21332555144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65333 (or 65329 counting only the distinct ones).

The product of its digits is 72000, while the sum is 35.

The spelling of 21332555144 in words is "twenty-one billion, three hundred thirty-two million, five hundred fifty-five thousand, one hundred forty-four".