20346116551 has 2 divisors, whose sum is σ = 20346116552. Its totient is φ = 20346116550.

The previous prime is 20346116537. The next prime is 20346116597. The reversal of 20346116551 is 15561164302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20346116551 - 2¹³ = 20346108359 is a prime.

It is a super-2 number, since 2×20346116551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20346116051) 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, 10173058275 + 10173058276.

It is an arithmetic number, because the mean of its divisors is an integer number (10173058276).

Almost surely, 2^20346116551 is an apocalyptic number.

20346116551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20346116551 is an equidigital number, since it uses as much as digits as its factorization.

20346116551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 20346116551 in words is "twenty billion, three hundred forty-six million, one hundred sixteen thousand, five hundred fifty-one".