21070651602 has 192 divisors, whose sum is σ = 57944605824. Its totient is φ = 5020968960.

The previous prime is 21070651577. The next prime is 21070651619. The reversal of 21070651602 is 20615607012.

It is a self number, because there is not a number n which added to its sum of digits gives 21070651602.

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 95 ways as a sum of consecutive naturals, for example, 7271818 + ... + 7274714.

It is an arithmetic number, because the mean of its divisors is an integer number (301794822).

Almost surely, 2^21070651602 is an apocalyptic number.

21070651602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21070651602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28972302912).

21070651602 is an abundant number, since it is smaller than the sum of its proper divisors (36873954222).

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

21070651602 is a wasteful number, since it uses less digits than its factorization.

21070651602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113 (or 3106 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The spelling of 21070651602 in words is "twenty-one billion, seventy million, six hundred fifty-one thousand, six hundred two".