20311484287 has 2 divisors, whose sum is σ = 20311484288. Its totient is φ = 20311484286.

The previous prime is 20311484251. The next prime is 20311484351. The reversal of 20311484287 is 78248411302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20311484287 - 2²³ = 20303095679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311484387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155742143 + 10155742144.

It is an arithmetic number, because the mean of its divisors is an integer number (10155742144).

Almost surely, 2^20311484287 is an apocalyptic number.

20311484287 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311484287 is an equidigital number, since it uses as much as digits as its factorization.

20311484287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 40.

Adding to 20311484287 its reverse (78248411302), we get a palindrome (98559895589).

The spelling of 20311484287 in words is "twenty billion, three hundred eleven million, four hundred eighty-four thousand, two hundred eighty-seven".