21826725655 has 8 divisors (see below), whose sum is σ = 29933795232. Its totient is φ = 14966897568.

The previous prime is 21826725649. The next prime is 21826725671. The reversal of 21826725655 is 55652762812.

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

It is not a de Polignac number, because 21826725655 - 2³ = 21826725647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21826725599 and 21826725608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311810332 + ... + 311810401.

It is an arithmetic number, because the mean of its divisors is an integer number (3741724404).

Almost surely, 2^21826725655 is an apocalyptic number.

21826725655 is a deficient number, since it is larger than the sum of its proper divisors (8107069577).

21826725655 is an equidigital number, since it uses as much as digits as its factorization.

21826725655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623620745.

The product of its digits is 2016000, while the sum is 49.

The spelling of 21826725655 in words is "twenty-one billion, eight hundred twenty-six million, seven hundred twenty-five thousand, six hundred fifty-five".