21423424330412 has 48 divisors (see below), whose sum is σ = 41436974591712. Its totient is φ = 9630361628160.

The previous prime is 21423424330403. The next prime is 21423424330531. The reversal of 21423424330412 is 21403342432412.

It is a happy number.

It is a super-2 number, since 2×21423424330412² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27992414 + ... + 28747557.

It is an arithmetic number, because the mean of its divisors is an integer number (863270303994).

Almost surely, 2^{21423424330412} is an apocalyptic number.

It is an amenable number.

21423424330412 is a deficient number, since it is larger than the sum of its proper divisors (20013550261300).

21423424330412 is a wasteful number, since it uses less digits than its factorization.

21423424330412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56740178 (or 56740176 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 21423424330412 its reverse (21403342432412), we get a palindrome (42826766762824).

The spelling of 21423424330412 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, three hundred thirty thousand, four hundred twelve".