21522530104 has 8 divisors (see below), whose sum is σ = 40354743960. Its totient is φ = 10761265048.

The previous prime is 21522530093. The next prime is 21522530129. The reversal of 21522530104 is 40103522512.

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1345158124 + ... + 1345158139.

It is an arithmetic number, because the mean of its divisors is an integer number (5044342995).

Almost surely, 2^21522530104 is an apocalyptic number.

It is an amenable number.

21522530104 is a deficient number, since it is larger than the sum of its proper divisors (18832213856).

21522530104 is a wasteful number, since it uses less digits than its factorization.

21522530104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2690316269 (or 2690316265 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 21522530104 in words is "twenty-one billion, five hundred twenty-two million, five hundred thirty thousand, one hundred four".