20029265761 has 2 divisors, whose sum is σ = 20029265762. Its totient is φ = 20029265760.

The previous prime is 20029265687. The next prime is 20029265783. The reversal of 20029265761 is 16756292002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20027627361 + 1638400 = 141519^2 + 1280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20029265761 is a prime.

It is not a weakly prime, because it can be changed into another prime (20029268761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10014632880 + 10014632881.

It is an arithmetic number, because the mean of its divisors is an integer number (10014632881).

Almost surely, 2^20029265761 is an apocalyptic number.

It is an amenable number.

20029265761 is a deficient number, since it is larger than the sum of its proper divisors (1).

20029265761 is an equidigital number, since it uses as much as digits as its factorization.

20029265761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 20029265761 in words is "twenty billion, twenty-nine million, two hundred sixty-five thousand, seven hundred sixty-one".