21236008412 has 12 divisors (see below), whose sum is σ = 37864204056. Its totient is φ = 10417664400.

The previous prime is 21236008403. The next prime is 21236008441. The reversal of 21236008412 is 21480063212.

It is a happy number.

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, 50084714 + ... + 50085137.

It is an arithmetic number, because the mean of its divisors is an integer number (3155350338).

Almost surely, 2^21236008412 is an apocalyptic number.

It is an amenable number.

21236008412 is a deficient number, since it is larger than the sum of its proper divisors (16628195644).

21236008412 is a wasteful number, since it uses less digits than its factorization.

21236008412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100169908 (or 100169906 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 21236008412 in words is "twenty-one billion, two hundred thirty-six million, eight thousand, four hundred twelve".