21443534108 has 6 divisors (see below), whose sum is σ = 37526184696. Its totient is φ = 10721767052.

The previous prime is 21443534081. The next prime is 21443534111. The reversal of 21443534108 is 80143534412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680441760 + ... + 2680441767.

It is an arithmetic number, because the mean of its divisors is an integer number (6254364116).

Almost surely, 2^21443534108 is an apocalyptic number.

It is an amenable number.

21443534108 is a deficient number, since it is larger than the sum of its proper divisors (16082650588).

21443534108 is a wasteful number, since it uses less digits than its factorization.

21443534108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360883531 (or 5360883529 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 21443534108 in words is "twenty-one billion, four hundred forty-three million, five hundred thirty-four thousand, one hundred eight".