20423514415519 has 2 divisors, whose sum is σ = 20423514415520. Its totient is φ = 20423514415518.

The previous prime is 20423514415511. The next prime is 20423514415547. The reversal of 20423514415519 is 91551441532402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20423514415519 - 2³ = 20423514415511 is a prime.

It is a super-2 number, since 2×20423514415519² (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 (20423514415511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10211757207759 + 10211757207760.

It is an arithmetic number, because the mean of its divisors is an integer number (10211757207760).

Almost surely, 2^{20423514415519} is an apocalyptic number.

20423514415519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20423514415519 is an equidigital number, since it uses as much as digits as its factorization.

20423514415519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864000, while the sum is 46.

The spelling of 20423514415519 in words is "twenty trillion, four hundred twenty-three billion, five hundred fourteen million, four hundred fifteen thousand, five hundred nineteen".