20465444956519 has 2 divisors, whose sum is σ = 20465444956520. Its totient is φ = 20465444956518.

The previous prime is 20465444956447. The next prime is 20465444956597. The reversal of 20465444956519 is 91565944456402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20465444956519 - 2¹⁵ = 20465444923751 is a prime.

It is a super-2 number, since 2×20465444956519² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20465444951519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10232722478259 + 10232722478260.

It is an arithmetic number, because the mean of its divisors is an integer number (10232722478260).

Almost surely, 2^{20465444956519} is an apocalyptic number.

20465444956519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20465444956519 is an equidigital number, since it uses as much as digits as its factorization.

20465444956519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624000, while the sum is 64.

The spelling of 20465444956519 in words is "twenty trillion, four hundred sixty-five billion, four hundred forty-four million, nine hundred fifty-six thousand, five hundred nineteen".