20631986119 has 2 divisors, whose sum is σ = 20631986120. Its totient is φ = 20631986118.

The previous prime is 20631986117. The next prime is 20631986147. The reversal of 20631986119 is 91168913602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20631986119 - 2¹ = 20631986117 is a prime.

It is a super-2 number, since 2×20631986119² (a number of 21 digits) contains 22 as substring.

Together with 20631986117, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20631986117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315993059 + 10315993060.

It is an arithmetic number, because the mean of its divisors is an integer number (10315993060).

Almost surely, 2^20631986119 is an apocalyptic number.

20631986119 is a deficient number, since it is larger than the sum of its proper divisors (1).

20631986119 is an equidigital number, since it uses as much as digits as its factorization.

20631986119 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 20631986119 in words is "twenty billion, six hundred thirty-one million, nine hundred eighty-six thousand, one hundred nineteen".