21343684450858 has 32 divisors (see below), whose sum is σ = 39973226807808. Its totient is φ = 8303686844400.

The previous prime is 21343684450831. The next prime is 21343684450877. The reversal of 21343684450858 is 85805448634312.

It is a junction number, because it is equal to n+sod(n) for n = 21343684450796 and 21343684450805.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100179660 + ... + 100392487.

It is an arithmetic number, because the mean of its divisors is an integer number (1249163337744).

Almost surely, 2^{21343684450858} is an apocalyptic number.

21343684450858 is a deficient number, since it is larger than the sum of its proper divisors (18629542356950).

21343684450858 is a wasteful number, since it uses less digits than its factorization.

21343684450858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200572858.

The product of its (nonzero) digits is 88473600, while the sum is 61.

The spelling of 21343684450858 in words is "twenty-one trillion, three hundred forty-three billion, six hundred eighty-four million, four hundred fifty thousand, eight hundred fifty-eight".