21156842677333 has 8 divisors (see below), whose sum is σ = 23824714334976. Its totient is φ = 18613058073600.

The previous prime is 21156842677303. The next prime is 21156842677337. The reversal of 21156842677333 is 33377624865112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21156842677333 is a prime.

It is a super-2 number, since 2×21156842677333² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21156842677337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31021763116 + ... + 31021763797.

It is an arithmetic number, because the mean of its divisors is an integer number (2978089291872).

Almost surely, 2^{21156842677333} is an apocalyptic number.

It is an amenable number.

21156842677333 is a deficient number, since it is larger than the sum of its proper divisors (2667871657643).

21156842677333 is a wasteful number, since it uses less digits than its factorization.

21156842677333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62043526955.

The product of its digits is 30481920, while the sum is 58.

The spelling of 21156842677333 in words is "twenty-one trillion, one hundred fifty-six billion, eight hundred forty-two million, six hundred seventy-seven thousand, three hundred thirty-three".