21432344323412 has 48 divisors (see below), whose sum is σ = 41282648737344. Its totient is φ = 9654765120000.

The previous prime is 21432344323399. The next prime is 21432344323421.

21432344323412 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49010087 + ... + 49445457.

It is an arithmetic number, because the mean of its divisors is an integer number (860055182028).

Almost surely, 2^{21432344323412} is an apocalyptic number.

21432344323412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21432344323412 is a deficient number, since it is larger than the sum of its proper divisors (19850304413932).

21432344323412 is a wasteful number, since it uses less digits than its factorization.

21432344323412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445400 (or 445398 counting only the distinct ones).

The product of its digits is 331776, while the sum is 38.

It can be divided in two parts, 2143234 and 4323412, that added together give a palindrome (6466646).

The spelling of 21432344323412 in words is "twenty-one trillion, four hundred thirty-two billion, three hundred forty-four million, three hundred twenty-three thousand, four hundred twelve".