19818614051 has 2 divisors, whose sum is σ = 19818614052. Its totient is φ = 19818614050.

The previous prime is 19818614041. The next prime is 19818614111. The reversal of 19818614051 is 15041681891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19818614051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19818613993 and 19818614011.

It is not a weakly prime, because it can be changed into another prime (19818614041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9909307025 + 9909307026.

It is an arithmetic number, because the mean of its divisors is an integer number (9909307026).

Almost surely, 2^19818614051 is an apocalyptic number.

19818614051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19818614051 is an equidigital number, since it uses as much as digits as its factorization.

19818614051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 44.

The spelling of 19818614051 in words is "nineteen billion, eight hundred eighteen million, six hundred fourteen thousand, fifty-one".