20387519219563 has 2 divisors, whose sum is σ = 20387519219564. Its totient is φ = 20387519219562.

The previous prime is 20387519219539. The next prime is 20387519219591. The reversal of 20387519219563 is 36591291578302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20387519219563 is a prime.

It is not a weakly prime, because it can be changed into another prime (20387519219363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193759609781 + 10193759609782.

It is an arithmetic number, because the mean of its divisors is an integer number (10193759609782).

Almost surely, 2^{20387519219563} is an apocalyptic number.

20387519219563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20387519219563 is an equidigital number, since it uses as much as digits as its factorization.

20387519219563 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 61.

The spelling of 20387519219563 in words is "twenty trillion, three hundred eighty-seven billion, five hundred nineteen million, two hundred nineteen thousand, five hundred sixty-three".