21366895136894 has 8 divisors (see below), whose sum is σ = 32056741271520. Its totient is φ = 10681314713056.

The previous prime is 21366895136843. The next prime is 21366895136963. The reversal of 21366895136894 is 49863159866312.

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

It is a congruent number.

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, 1066415174 + ... + 1066435209.

It is an arithmetic number, because the mean of its divisors is an integer number (4007092658940).

Almost surely, 2^{21366895136894} is an apocalyptic number.

21366895136894 is a deficient number, since it is larger than the sum of its proper divisors (10689846134626).

21366895136894 is a wasteful number, since it uses less digits than its factorization.

21366895136894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132855394.

The product of its digits is 403107840, while the sum is 71.

The spelling of 21366895136894 in words is "twenty-one trillion, three hundred sixty-six billion, eight hundred ninety-five million, one hundred thirty-six thousand, eight hundred ninety-four".