21443511534412 has 48 divisors (see below), whose sum is σ = 43346493066240. Its totient is φ = 9173528582400.

The previous prime is 21443511534397. The next prime is 21443511534433.

21443511534412 is nontrivially palindromic in base 10.

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 15 ways as a sum of consecutive naturals, for example, 46739389 + ... + 47195947.

It is an arithmetic number, because the mean of its divisors is an integer number (903051938880).

Almost surely, 2^{21443511534412} is an apocalyptic number.

21443511534412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21443511534412 is an abundant number, since it is smaller than the sum of its proper divisors (21902981531828).

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

21443511534412 is a wasteful number, since it uses less digits than its factorization.

21443511534412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519382 (or 519380 counting only the distinct ones).

The product of its digits is 230400, while the sum is 40.

It can be divided in two parts, 2144351 and 1534412, that added together give a palindrome (3678763).

The spelling of 21443511534412 in words is "twenty-one trillion, four hundred forty-three billion, five hundred eleven million, five hundred thirty-four thousand, four hundred twelve".