21343455434312 has 48 divisors (see below), whose sum is σ = 43989021457920. Its totient is φ = 9701301985760.

The previous prime is 21343455434309. The next prime is 21343455434321.

21343455434312 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37023593 + ... + 37595655.

It is an arithmetic number, because the mean of its divisors is an integer number (916437947040).

Almost surely, 2^{21343455434312} is an apocalyptic number.

21343455434312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21343455434312 is an abundant number, since it is smaller than the sum of its proper divisors (22645566023608).

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

21343455434312 is a wasteful number, since it uses less digits than its factorization.

21343455434312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610634 (or 610619 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 44.

It can be divided in two parts, 2134345 and 5434312, that added together give a palindrome (7568657).

The spelling of 21343455434312 in words is "twenty-one trillion, three hundred forty-three billion, four hundred fifty-five million, four hundred thirty-four thousand, three hundred twelve".