19400478967 has 2 divisors, whose sum is σ = 19400478968. Its totient is φ = 19400478966.

The previous prime is 19400478961. The next prime is 19400478971. The reversal of 19400478967 is 76987400491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19400478967 - 2³ = 19400478959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19400478961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9700239483 + 9700239484.

It is an arithmetic number, because the mean of its divisors is an integer number (9700239484).

Almost surely, 2^19400478967 is an apocalyptic number.

19400478967 is a deficient number, since it is larger than the sum of its proper divisors (1).

19400478967 is an equidigital number, since it uses as much as digits as its factorization.

19400478967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 19400478967 in words is "nineteen billion, four hundred million, four hundred seventy-eight thousand, nine hundred sixty-seven".