21726220115476 has 12 divisors (see below), whose sum is σ = 38021814345172. Its totient is φ = 10862844588288.

The previous prime is 21726220115443. The next prime is 21726220115489. The reversal of 21726220115476 is 67451102262712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3024712288900 + 18701507826576 = 1739170^2 + 4324524^2 .

It is a super-3 number, since 3×21726220115476³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66183165 + ... + 66510628.

Almost surely, 2^{21726220115476} is an apocalyptic number.

It is an amenable number.

21726220115476 is a deficient number, since it is larger than the sum of its proper divisors (16295594229696).

21726220115476 is a wasteful number, since it uses less digits than its factorization.

21726220115476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132734730 (or 132734728 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 21726220115476 in words is "twenty-one trillion, seven hundred twenty-six billion, two hundred twenty million, one hundred fifteen thousand, four hundred seventy-six".