20535544553519 has 2 divisors, whose sum is σ = 20535544553520. Its totient is φ = 20535544553518.

The previous prime is 20535544553501. The next prime is 20535544553569. The reversal of 20535544553519 is 91535544553502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20535544553519 - 2³⁶ = 20466825076783 is a prime.

It is a super-2 number, since 2×20535544553519² (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 (20535544553569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10267772276759 + 10267772276760.

It is an arithmetic number, because the mean of its divisors is an integer number (10267772276760).

Almost surely, 2^{20535544553519} is an apocalyptic number.

20535544553519 is a deficient number, since it is larger than the sum of its proper divisors (1).

20535544553519 is an equidigital number, since it uses as much as digits as its factorization.

20535544553519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40500000, while the sum is 56.

The spelling of 20535544553519 in words is "twenty trillion, five hundred thirty-five billion, five hundred forty-four million, five hundred fifty-three thousand, five hundred nineteen".