21536365602 has 16 divisors (see below), whose sum is σ = 43077877920. Its totient is φ = 7177930752.

The previous prime is 21536365597. The next prime is 21536365607. The reversal of 21536365602 is 20656363512.

21536365602 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (21536365597) and next prime (21536365607).

It is not an unprimeable number, because it can be changed into a prime (21536365607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158943 + ... + 261410.

It is an arithmetic number, because the mean of its divisors is an integer number (2692367370).

Almost surely, 2^21536365602 is an apocalyptic number.

21536365602 is an abundant number, since it is smaller than the sum of its proper divisors (21541512318).

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

21536365602 is a wasteful number, since it uses less digits than its factorization.

21536365602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428897.

The product of its (nonzero) digits is 194400, while the sum is 39.

The spelling of 21536365602 in words is "twenty-one billion, five hundred thirty-six million, three hundred sixty-five thousand, six hundred two".