20343762449 has 2 divisors, whose sum is σ = 20343762450. Its totient is φ = 20343762448.

The previous prime is 20343762401. The next prime is 20343762457. The reversal of 20343762449 is 94426734302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16846222849 + 3497539600 = 129793^2 + 59140^2 .

It is a cyclic number.

It is not a de Polignac number, because 20343762449 - 2¹² = 20343758353 is a prime.

It is not a weakly prime, because it can be changed into another prime (20343762149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171881224 + 10171881225.

It is an arithmetic number, because the mean of its divisors is an integer number (10171881225).

Almost surely, 2^20343762449 is an apocalyptic number.

It is an amenable number.

20343762449 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343762449 is an equidigital number, since it uses as much as digits as its factorization.

20343762449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 20343762449 in words is "twenty billion, three hundred forty-three million, seven hundred sixty-two thousand, four hundred forty-nine".