21362274402648 has 16 divisors (see below), whose sum is σ = 53405686006680. Its totient is φ = 7120758134208.

The previous prime is 21362274402641. The next prime is 21362274402767. The reversal of 21362274402648 is 84620447226312.

It is a self number, because there is not a number n which added to its sum of digits gives 21362274402648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21362274402641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445047383365 + ... + 445047383412.

Almost surely, 2^{21362274402648} is an apocalyptic number.

It is an amenable number.

21362274402648 is an abundant number, since it is smaller than the sum of its proper divisors (32043411604032).

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

21362274402648 is a wasteful number, since it uses less digits than its factorization.

21362274402648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890094766786 (or 890094766782 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 51.

The spelling of 21362274402648 in words is "twenty-one trillion, three hundred sixty-two billion, two hundred seventy-four million, four hundred two thousand, six hundred forty-eight".