21443434412 has 6 divisors (see below), whose sum is σ = 37526010228. Its totient is φ = 10721717204.

The previous prime is 21443434393. The next prime is 21443434457.

21443434412 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 as a sum of consecutive naturals, namely, 2680429298 + ... + 2680429305.

It is an arithmetic number, because the mean of its divisors is an integer number (6254335038).

Almost surely, 2^21443434412 is an apocalyptic number.

It is an amenable number.

21443434412 is a deficient number, since it is larger than the sum of its proper divisors (16082575816).

21443434412 is a wasteful number, since it uses less digits than its factorization.

21443434412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5360858607 (or 5360858605 counting only the distinct ones).

The product of its digits is 36864, while the sum is 32.

The spelling of 21443434412 in words is "twenty-one billion, four hundred forty-three million, four hundred thirty-four thousand, four hundred twelve".