21234447696 has 80 divisors (see below), whose sum is σ = 68391479808. Its totient is φ = 5515440000.

The previous prime is 21234447629. The next prime is 21234447713. The reversal of 21234447696 is 69674443212.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 15 ways as a sum of consecutive naturals, for example, 2868930 + ... + 2876321.

Almost surely, 2^21234447696 is an apocalyptic number.

It is an amenable number.

21234447696 is an abundant number, since it is smaller than the sum of its proper divisors (47157032112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21234447696 is a wasteful number, since it uses less digits than its factorization.

21234447696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5745280 (or 5745274 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 48.

The spelling of 21234447696 in words is "twenty-one billion, two hundred thirty-four million, four hundred forty-seven thousand, six hundred ninety-six".