20018462819 has 2 divisors, whose sum is σ = 20018462820. Its totient is φ = 20018462818.

The previous prime is 20018462791. The next prime is 20018462839. The reversal of 20018462819 is 91826481002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20018462819 is a prime.

It is a super-2 number, since 2×20018462819² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20018462839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10009231409 + 10009231410.

It is an arithmetic number, because the mean of its divisors is an integer number (10009231410).

Almost surely, 2^20018462819 is an apocalyptic number.

20018462819 is a deficient number, since it is larger than the sum of its proper divisors (1).

20018462819 is an equidigital number, since it uses as much as digits as its factorization.

20018462819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 20018462819 in words is "twenty billion, eighteen million, four hundred sixty-two thousand, eight hundred nineteen".