21621271632024 has 16 divisors (see below), whose sum is σ = 54053179080120. Its totient is φ = 7207090544000.

The previous prime is 21621271632007. The next prime is 21621271632029. The reversal of 21621271632024 is 42023617212612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621271632029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 450443158977 + ... + 450443159024.

Almost surely, 2^{21621271632024} is an apocalyptic number.

21621271632024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21621271632024 is an abundant number, since it is smaller than the sum of its proper divisors (32431907448096).

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

21621271632024 is a wasteful number, since it uses less digits than its factorization.

21621271632024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900886318010 (or 900886318006 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

Adding to 21621271632024 its reverse (42023617212612), we get a palindrome (63644888844636).

The spelling of 21621271632024 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred seventy-one million, six hundred thirty-two thousand, twenty-four".