21343841802 has 96 divisors (see below), whose sum is σ = 50185092672. Its totient is φ = 6529807872.

The previous prime is 21343841791. The next prime is 21343841821. The reversal of 21343841802 is 20814834312.

It is a happy number.

21343841802 is a `hidden beast` number, since 213 + 438 + 4 + 1 + 8 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13117713 + ... + 13119339.

It is an arithmetic number, because the mean of its divisors is an integer number (522761382).

Almost surely, 2^21343841802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21343841802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25092546336).

21343841802 is an abundant number, since it is smaller than the sum of its proper divisors (28841250870).

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

21343841802 is a wasteful number, since it uses less digits than its factorization.

21343841802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2692 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 21343841802 in words is "twenty-one billion, three hundred forty-three million, eight hundred forty-one thousand, eight hundred two".