21726626505747 has 8 divisors (see below), whose sum is σ = 29093165107344. Its totient is φ = 14422252787328.

The previous prime is 21726626505737. The next prime is 21726626505763. The reversal of 21726626505747 is 74750562662712.

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

It is not a de Polignac number, because 21726626505747 - 2¹⁴ = 21726626489363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21726626505707) 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, 15541219978 + ... + 15541221375.

It is an arithmetic number, because the mean of its divisors is an integer number (3636645638418).

Almost surely, 2^{21726626505747} is an apocalyptic number.

21726626505747 is a deficient number, since it is larger than the sum of its proper divisors (7366538601597).

21726626505747 is a wasteful number, since it uses less digits than its factorization.

21726626505747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31082441589.

The product of its (nonzero) digits is 59270400, while the sum is 60.

The spelling of 21726626505747 in words is "twenty-one trillion, seven hundred twenty-six billion, six hundred twenty-six million, five hundred five thousand, seven hundred forty-seven".