21424042412 has 24 divisors (see below), whose sum is σ = 37609216176. Its totient is φ = 10678606848.

The previous prime is 21424042411. The next prime is 21424042459.

It is a happy number.

21424042412 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (21424042411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1724768 + ... + 1737144.

It is an arithmetic number, because the mean of its divisors is an integer number (1567050674).

Almost surely, 2^21424042412 is an apocalyptic number.

It is an amenable number.

21424042412 is a deficient number, since it is larger than the sum of its proper divisors (16185173764).

21424042412 is a wasteful number, since it uses less digits than its factorization.

21424042412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13697 (or 13695 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

It can be divided in two parts, 214240 and 42412, that added together give a palindrome (256652).

The spelling of 21424042412 in words is "twenty-one billion, four hundred twenty-four million, forty-two thousand, four hundred twelve".