21580923196771 has 2 divisors, whose sum is σ = 21580923196772. Its totient is φ = 21580923196770.

The previous prime is 21580923196717. The next prime is 21580923196801. The reversal of 21580923196771 is 17769132908512.

Together with previous prime (21580923196717) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21580923196771 - 2¹³ = 21580923188579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21580923296771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10790461598385 + 10790461598386.

It is an arithmetic number, because the mean of its divisors is an integer number (10790461598386).

Almost surely, 2^{21580923196771} is an apocalyptic number.

21580923196771 is a deficient number, since it is larger than the sum of its proper divisors (1).

21580923196771 is an equidigital number, since it uses as much as digits as its factorization.

21580923196771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11430720, while the sum is 61.

The spelling of 21580923196771 in words is "twenty-one trillion, five hundred eighty billion, nine hundred twenty-three million, one hundred ninety-six thousand, seven hundred seventy-one".