21313602036 has 24 divisors (see below), whose sum is σ = 55257487040. Its totient is φ = 7104533976.

The previous prime is 21313602031. The next prime is 21313602047. The reversal of 21313602036 is 63020631312.

It is a happy number.

21313602036 is a `hidden beast` number, since 2 + 13 + 13 + 602 + 0 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313602031) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 98673976 + ... + 98674191.

Almost surely, 2^21313602036 is an apocalyptic number.

It is an amenable number.

21313602036 is an abundant number, since it is smaller than the sum of its proper divisors (33943885004).

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

21313602036 is a wasteful number, since it uses less digits than its factorization.

21313602036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197348180 (or 197348172 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The spelling of 21313602036 in words is "twenty-one billion, three hundred thirteen million, six hundred two thousand, thirty-six".