21550542432324 has 24 divisors (see below), whose sum is σ = 50368546603200. Its totient is φ = 7171521630624.

The previous prime is 21550542432313. The next prime is 21550542432383. The reversal of 21550542432324 is 42323424505512.

It is a super-2 number, since 2×21550542432324² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499056699 + ... + 1499071074.

It is an arithmetic number, because the mean of its divisors is an integer number (2098689441800).

Almost surely, 2^{21550542432324} is an apocalyptic number.

It is an amenable number.

21550542432324 is an abundant number, since it is smaller than the sum of its proper divisors (28818004170876).

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

21550542432324 is a wasteful number, since it uses less digits than its factorization.

21550542432324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998128379 (or 2998128377 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 42.

Adding to 21550542432324 its reverse (42323424505512), we get a palindrome (63873966937836).

The spelling of 21550542432324 in words is "twenty-one trillion, five hundred fifty billion, five hundred forty-two million, four hundred thirty-two thousand, three hundred twenty-four".