21423342004 has 12 divisors (see below), whose sum is σ = 39464051200. Its totient is φ = 10147898808.

The previous prime is 21423341977. The next prime is 21423342029. The reversal of 21423342004 is 40024332412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21423342004.

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 3 ways as a sum of consecutive naturals, for example, 140942964 + ... + 140943115.

Almost surely, 2^21423342004 is an apocalyptic number.

It is an amenable number.

21423342004 is a deficient number, since it is larger than the sum of its proper divisors (18040709196).

21423342004 is a wasteful number, since it uses less digits than its factorization.

21423342004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281886102 (or 281886100 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21423342004 its reverse (40024332412), we get a palindrome (61447674416).

The spelling of 21423342004 in words is "twenty-one billion, four hundred twenty-three million, three hundred forty-two thousand, four".