21230326404055 has 16 divisors (see below), whose sum is σ = 26165097373824. Its totient is φ = 16525129420800.

The previous prime is 21230326404029. The next prime is 21230326404083. The reversal of 21230326404055 is 55040462303212.

It is not a de Polignac number, because 21230326404055 - 2¹⁷ = 21230326272983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60422130 + ... + 60772480.

It is an arithmetic number, because the mean of its divisors is an integer number (1635318585864).

Almost surely, 2^{21230326404055} is an apocalyptic number.

21230326404055 is a deficient number, since it is larger than the sum of its proper divisors (4934770969769).

21230326404055 is a wasteful number, since it uses less digits than its factorization.

21230326404055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677946.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 21230326404055 its reverse (55040462303212), we get a palindrome (76270788707267).

The spelling of 21230326404055 in words is "twenty-one trillion, two hundred thirty billion, three hundred twenty-six million, four hundred four thousand, fifty-five".