20415766923353 has 2 divisors, whose sum is σ = 20415766923354. Its totient is φ = 20415766923352.

The previous prime is 20415766923313. The next prime is 20415766923361. The reversal of 20415766923353 is 35332966751402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17264332471369 + 3151434451984 = 4155037^2 + 1775228^2 .

It is a cyclic number.

It is not a de Polignac number, because 20415766923353 - 2¹⁶ = 20415766857817 is a prime.

It is not a weakly prime, because it can be changed into another prime (20415766923313) 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, 10207883461676 + 10207883461677.

It is an arithmetic number, because the mean of its divisors is an integer number (10207883461677).

Almost surely, 2^{20415766923353} is an apocalyptic number.

It is an amenable number.

20415766923353 is a deficient number, since it is larger than the sum of its proper divisors (1).

20415766923353 is an equidigital number, since it uses as much as digits as its factorization.

20415766923353 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 56.

The spelling of 20415766923353 in words is "twenty trillion, four hundred fifteen billion, seven hundred sixty-six million, nine hundred twenty-three thousand, three hundred fifty-three".