21067684258 has 8 divisors (see below), whose sum is σ = 32620930560. Its totient is φ = 10194040740.

The previous prime is 21067684241. The next prime is 21067684273. The reversal of 21067684258 is 85248676012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169900618 + ... + 169900741.

It is an arithmetic number, because the mean of its divisors is an integer number (4077616320).

Almost surely, 2^21067684258 is an apocalyptic number.

21067684258 is a deficient number, since it is larger than the sum of its proper divisors (11553246302).

21067684258 is a wasteful number, since it uses less digits than its factorization.

21067684258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339801392.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 21067684258 in words is "twenty-one billion, sixty-seven million, six hundred eighty-four thousand, two hundred fifty-eight".