19734800051 has 2 divisors, whose sum is σ = 19734800052. Its totient is φ = 19734800050.

The previous prime is 19734800039. The next prime is 19734800069. The reversal of 19734800051 is 15000843791.

It is a weak prime.

It is an emirp because it is prime and its reverse (15000843791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19734800051 - 2²² = 19730605747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19734799978 and 19734800014.

It is not a weakly prime, because it can be changed into another prime (19734800021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9867400025 + 9867400026.

It is an arithmetic number, because the mean of its divisors is an integer number (9867400026).

Almost surely, 2^19734800051 is an apocalyptic number.

19734800051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19734800051 is an equidigital number, since it uses as much as digits as its factorization.

19734800051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 19734800051 in words is "nineteen billion, seven hundred thirty-four million, eight hundred thousand, fifty-one".