19400779327 has 2 divisors, whose sum is σ = 19400779328. Its totient is φ = 19400779326.

The previous prime is 19400779303. The next prime is 19400779361. The reversal of 19400779327 is 72397700491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19400779327 - 2³¹ = 17253295679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19400779127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9700389663 + 9700389664.

It is an arithmetic number, because the mean of its divisors is an integer number (9700389664).

Almost surely, 2^19400779327 is an apocalyptic number.

19400779327 is a deficient number, since it is larger than the sum of its proper divisors (1).

19400779327 is an equidigital number, since it uses as much as digits as its factorization.

19400779327 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 666792, while the sum is 49.

The spelling of 19400779327 in words is "nineteen billion, four hundred million, seven hundred seventy-nine thousand, three hundred twenty-seven".