21443034513432 has 64 divisors (see below), whose sum is σ = 62921645694720. Its totient is φ = 5960998009728.

The previous prime is 21443034513427. The next prime is 21443034513437. The reversal of 21443034513432 is 23431543034412.

It is an interprime number because it is at equal distance from previous prime (21443034513427) and next prime (21443034513437).

It is a super-3 number, since 3×21443034513432³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21443034513437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1724819598 + ... + 1724832029.

It is an arithmetic number, because the mean of its divisors is an integer number (983150713980).

Almost surely, 2^{21443034513432} is an apocalyptic number.

It is an amenable number.

21443034513432 is an abundant number, since it is smaller than the sum of its proper divisors (41478611181288).

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

21443034513432 is a wasteful number, since it uses less digits than its factorization.

21443034513432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449651680 (or 3449651676 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 39.

Adding to 21443034513432 its reverse (23431543034412), we get a palindrome (44874577547844).

The spelling of 21443034513432 in words is "twenty-one trillion, four hundred forty-three billion, thirty-four million, five hundred thirteen thousand, four hundred thirty-two".