23040288015821 has 2 divisors, whose sum is σ = 23040288015822. Its totient is φ = 23040288015820.

The previous prime is 23040288015793. The next prime is 23040288015841. The reversal of 23040288015821 is 12851088204032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22471486968100 + 568801047721 = 4740410^2 + 754189^2 .

It is a cyclic number.

It is not a de Polignac number, because 23040288015821 - 2¹⁴ = 23040287999437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23040288015841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11520144007910 + 11520144007911.

It is an arithmetic number, because the mean of its divisors is an integer number (11520144007911).

Almost surely, 2^{23040288015821} is an apocalyptic number.

It is an amenable number.

23040288015821 is a deficient number, since it is larger than the sum of its proper divisors (1).

23040288015821 is an equidigital number, since it uses as much as digits as its factorization.

23040288015821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 245760, while the sum is 44.

The spelling of 23040288015821 in words is "twenty-three trillion, forty billion, two hundred eighty-eight million, fifteen thousand, eight hundred twenty-one".