21442424412 has 24 divisors (see below), whose sum is σ = 51096842496. Its totient is φ = 6995400688.

The previous prime is 21442424387. The next prime is 21442424449.

21442424412 is nontrivially palindromic in base 10.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21442424412.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 19008678 + ... + 19009805.

It is an arithmetic number, because the mean of its divisors is an integer number (2129035104).

Almost surely, 2^21442424412 is an apocalyptic number.

It is an amenable number.

21442424412 is an abundant number, since it is smaller than the sum of its proper divisors (29654418084).

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

21442424412 is a wasteful number, since it uses less digits than its factorization.

21442424412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38018537 (or 38018535 counting only the distinct ones).

The product of its digits is 16384, while the sum is 30.

The spelling of 21442424412 in words is "twenty-one billion, four hundred forty-two million, four hundred twenty-four thousand, four hundred twelve".