21925992347813 has 2 divisors, whose sum is σ = 21925992347814. Its totient is φ = 21925992347812.

The previous prime is 21925992347803. The next prime is 21925992347827. The reversal of 21925992347813 is 31874329952912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21912528690724 + 13463657089 = 4681082^2 + 116033^2 .

It is a cyclic number.

It is not a de Polignac number, because 21925992347813 - 2⁴ = 21925992347797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21925992347813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21925992347803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10962996173906 + 10962996173907.

It is an arithmetic number, because the mean of its divisors is an integer number (10962996173907).

Almost surely, 2^{21925992347813} is an apocalyptic number.

It is an amenable number.

21925992347813 is a deficient number, since it is larger than the sum of its proper divisors (1).

21925992347813 is an equidigital number, since it uses as much as digits as its factorization.

21925992347813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 65.

The spelling of 21925992347813 in words is "twenty-one trillion, nine hundred twenty-five billion, nine hundred ninety-two million, three hundred forty-seven thousand, eight hundred thirteen".