21414431444 has 24 divisors (see below), whose sum is σ = 42859555200. Its totient is φ = 9171036576.

The previous prime is 21414431443. The next prime is 21414431449. The reversal of 21414431444 is 44413441412.

It is a super-3 number, since 3×21414431444³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21414431444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414431443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234167 + ... + 312510.

It is an arithmetic number, because the mean of its divisors is an integer number (1785814800).

Almost surely, 2^21414431444 is an apocalyptic number.

It is an amenable number.

21414431444 is an abundant number, since it is smaller than the sum of its proper divisors (21445123756).

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

21414431444 is a wasteful number, since it uses less digits than its factorization.

21414431444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548087 (or 548085 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

Adding to 21414431444 its reverse (44413441412), we get a palindrome (65827872856).

The spelling of 21414431444 in words is "twenty-one billion, four hundred fourteen million, four hundred thirty-one thousand, four hundred forty-four".