20616095015987 has 2 divisors, whose sum is σ = 20616095015988. Its totient is φ = 20616095015986.

The previous prime is 20616095015941. The next prime is 20616095016059. The reversal of 20616095015987 is 78951059061602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20616095015987 - 2³⁸ = 20341217109043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20616095011987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308047507993 + 10308047507994.

It is an arithmetic number, because the mean of its divisors is an integer number (10308047507994).

Almost surely, 2^{20616095015987} is an apocalyptic number.

20616095015987 is a deficient number, since it is larger than the sum of its proper divisors (1).

20616095015987 is an equidigital number, since it uses as much as digits as its factorization.

20616095015987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 20616095015987 in words is "twenty trillion, six hundred sixteen billion, ninety-five million, fifteen thousand, nine hundred eighty-seven".