21136768703751 has 8 divisors (see below), whose sum is σ = 28182380356080. Its totient is φ = 14091168093632.

The previous prime is 21136768703749. The next prime is 21136768703803. The reversal of 21136768703751 is 15730786763112.

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

It is a cyclic number.

It is not a de Polignac number, because 21136768703751 - 2¹ = 21136768703749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21136768703691 and 21136768703700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21136768773751) 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, 4247251 + ... + 7766123.

It is an arithmetic number, because the mean of its divisors is an integer number (3522797544510).

Almost surely, 2^{21136768703751} is an apocalyptic number.

21136768703751 is a deficient number, since it is larger than the sum of its proper divisors (7045611652329).

21136768703751 is a wasteful number, since it uses less digits than its factorization.

21136768703751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521105.

The product of its (nonzero) digits is 8890560, while the sum is 57.

The spelling of 21136768703751 in words is "twenty-one trillion, one hundred thirty-six billion, seven hundred sixty-eight million, seven hundred three thousand, seven hundred fifty-one".