21727672521499 has 8 divisors (see below), whose sum is σ = 24834001372640. Its totient is φ = 18621937578816.

The previous prime is 21727672521497. The next prime is 21727672521619. The reversal of 21727672521499 is 99412527672712.

It is a happy number.

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 21727672521499 - 2¹ = 21727672521497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21727672521499.

It is not an unprimeable number, because it can be changed into a prime (21727672521497) 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, 148398714 + ... + 148545055.

It is an arithmetic number, because the mean of its divisors is an integer number (3104250171580).

Almost surely, 2^{21727672521499} is an apocalyptic number.

21727672521499 is a deficient number, since it is larger than the sum of its proper divisors (3106328851141).

21727672521499 is a wasteful number, since it uses less digits than its factorization.

21727672521499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296954229.

The product of its digits is 53343360, while the sum is 64.

The spelling of 21727672521499 in words is "twenty-one trillion, seven hundred twenty-seven billion, six hundred seventy-two million, five hundred twenty-one thousand, four hundred ninety-nine".