20616631219 has 2 divisors, whose sum is σ = 20616631220. Its totient is φ = 20616631218.

The previous prime is 20616631157. The next prime is 20616631241. The reversal of 20616631219 is 91213661602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20616631219 is a prime.

It is a super-2 number, since 2×20616631219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20616631249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10308315609 + 10308315610.

It is an arithmetic number, because the mean of its divisors is an integer number (10308315610).

Almost surely, 2^20616631219 is an apocalyptic number.

20616631219 is a deficient number, since it is larger than the sum of its proper divisors (1).

20616631219 is an equidigital number, since it uses as much as digits as its factorization.

20616631219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The spelling of 20616631219 in words is "twenty billion, six hundred sixteen million, six hundred thirty-one thousand, two hundred nineteen".