19413406391 has 2 divisors, whose sum is σ = 19413406392. Its totient is φ = 19413406390.

The previous prime is 19413406357. The next prime is 19413406451. The reversal of 19413406391 is 19360431491.

It is a weak prime.

It is an emirp because it is prime and its reverse (19360431491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19413406391 - 2²² = 19409212087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19413406321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9706703195 + 9706703196.

It is an arithmetic number, because the mean of its divisors is an integer number (9706703196).

Almost surely, 2^19413406391 is an apocalyptic number.

19413406391 is a deficient number, since it is larger than the sum of its proper divisors (1).

19413406391 is an equidigital number, since it uses as much as digits as its factorization.

19413406391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 41.

The spelling of 19413406391 in words is "nineteen billion, four hundred thirteen million, four hundred six thousand, three hundred ninety-one".