21141726638511 has 8 divisors (see below), whose sum is σ = 28196762332464. Its totient is φ = 14090587685120.

The previous prime is 21141726638503. The next prime is 21141726638603. The reversal of 21141726638511 is 11583662714112.

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 21141726638511 - 2³ = 21141726638503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141726638111) 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, 974172480 + ... + 974194181.

It is an arithmetic number, because the mean of its divisors is an integer number (3524595291558).

Almost surely, 2^{21141726638511} is an apocalyptic number.

21141726638511 is a deficient number, since it is larger than the sum of its proper divisors (7055035693953).

21141726638511 is a wasteful number, since it uses less digits than its factorization.

21141726638511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948370281.

The product of its digits is 483840, while the sum is 48.

The spelling of 21141726638511 in words is "twenty-one trillion, one hundred forty-one billion, seven hundred twenty-six million, six hundred thirty-eight thousand, five hundred eleven".