21534535106 has 64 divisors (see below), whose sum is σ = 38762938368. Its totient is φ = 8780522688.

The previous prime is 21534535073. The next prime is 21534535123. The reversal of 21534535106 is 60153543512.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 6307856 + ... + 6311268.

It is an arithmetic number, because the mean of its divisors is an integer number (605670912).

Almost surely, 2^21534535106 is an apocalyptic number.

21534535106 is a deficient number, since it is larger than the sum of its proper divisors (17228403262).

21534535106 is a wasteful number, since it uses less digits than its factorization.

21534535106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3735.

The product of its (nonzero) digits is 54000, while the sum is 35.

The spelling of 21534535106 in words is "twenty-one billion, five hundred thirty-four million, five hundred thirty-five thousand, one hundred six".