21433421404 has 36 divisors (see below), whose sum is σ = 38704417752. Its totient is φ = 10383215040.

The previous prime is 21433421353. The next prime is 21433421407. The reversal of 21433421404 is 40412433412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433421407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 986482 + ... + 1007974.

Almost surely, 2^21433421404 is an apocalyptic number.

It is an amenable number.

21433421404 is a deficient number, since it is larger than the sum of its proper divisors (17270996348).

21433421404 is a wasteful number, since it uses less digits than its factorization.

21433421404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21686 (or 21623 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21433421404 its reverse (40412433412), we get a palindrome (61845854816).

The spelling of 21433421404 in words is "twenty-one billion, four hundred thirty-three million, four hundred twenty-one thousand, four hundred four".