21774374093 has 2 divisors, whose sum is σ = 21774374094. Its totient is φ = 21774374092.

The previous prime is 21774374077. The next prime is 21774374107. The reversal of 21774374093 is 39047347712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14825984644 + 6948389449 = 121762^2 + 83357^2 .

It is a cyclic number.

It is not a de Polignac number, because 21774374093 - 2⁴ = 21774374077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21774374003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10887187046 + 10887187047.

It is an arithmetic number, because the mean of its divisors is an integer number (10887187047).

Almost surely, 2^21774374093 is an apocalyptic number.

It is an amenable number.

21774374093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21774374093 is an equidigital number, since it uses as much as digits as its factorization.

21774374093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 889056, while the sum is 47.

The spelling of 21774374093 in words is "twenty-one billion, seven hundred seventy-four million, three hundred seventy-four thousand, ninety-three".