21144200334232 has 64 divisors (see below), whose sum is σ = 40531535280000. Its totient is φ = 10336270726656.

The previous prime is 21144200334137. The next prime is 21144200334239. The reversal of 21144200334232 is 23243300244112.

It is a super-2 number, since 2×21144200334232² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21144200334194 and 21144200334203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21144200334239) 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, 1810750378 + ... + 1810762054.

It is an arithmetic number, because the mean of its divisors is an integer number (633305238750).

Almost surely, 2^{21144200334232} is an apocalyptic number.

It is an amenable number.

21144200334232 is a deficient number, since it is larger than the sum of its proper divisors (19387334945768).

21144200334232 is a wasteful number, since it uses less digits than its factorization.

21144200334232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16388 (or 16384 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21144200334232 its reverse (23243300244112), we get a palindrome (44387500578344).

The spelling of 21144200334232 in words is "twenty-one trillion, one hundred forty-four billion, two hundred million, three hundred thirty-four thousand, two hundred thirty-two".