20342204403149 has 2 divisors, whose sum is σ = 20342204403150. Its totient is φ = 20342204403148.

The previous prime is 20342204403083. The next prime is 20342204403161. The reversal of 20342204403149 is 94130440224302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11876170377124 + 8466034026025 = 3446182^2 + 2909645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20342204403149 is a prime.

It is a super-2 number, since 2×20342204403149² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20342204403049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171102201574 + 10171102201575.

It is an arithmetic number, because the mean of its divisors is an integer number (10171102201575).

Almost surely, 2^{20342204403149} is an apocalyptic number.

It is an amenable number.

20342204403149 is a deficient number, since it is larger than the sum of its proper divisors (1).

20342204403149 is an equidigital number, since it uses as much as digits as its factorization.

20342204403149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 20342204403149 in words is "twenty trillion, three hundred forty-two billion, two hundred four million, four hundred three thousand, one hundred forty-nine".