21242433344020 has 96 divisors (see below), whose sum is σ = 53672603846400. Its totient is φ = 6898832446464.

The previous prime is 21242433344009. The next prime is 21242433344053. The reversal of 21242433344020 is 2044333424212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18578266 + ... + 19688494.

It is an arithmetic number, because the mean of its divisors is an integer number (559089623400).

Almost surely, 2^{21242433344020} is an apocalyptic number.

21242433344020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21242433344020 is an abundant number, since it is smaller than the sum of its proper divisors (32430170502380).

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

21242433344020 is a wasteful number, since it uses less digits than its factorization.

21242433344020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1117457 (or 1117455 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 21242433344020 its reverse (2044333424212), we get a palindrome (23286766768232).

The spelling of 21242433344020 in words is "twenty-one trillion, two hundred forty-two billion, four hundred thirty-three million, three hundred forty-four thousand, twenty".