19854323707 has 2 divisors, whose sum is σ = 19854323708. Its totient is φ = 19854323706.

The previous prime is 19854323669. The next prime is 19854323779. The reversal of 19854323707 is 70732345891.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19854323707 is a prime.

It is not a weakly prime, because it can be changed into another prime (19854323107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9927161853 + 9927161854.

It is an arithmetic number, because the mean of its divisors is an integer number (9927161854).

Almost surely, 2^19854323707 is an apocalyptic number.

19854323707 is a deficient number, since it is larger than the sum of its proper divisors (1).

19854323707 is an equidigital number, since it uses as much as digits as its factorization.

19854323707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The spelling of 19854323707 in words is "nineteen billion, eight hundred fifty-four million, three hundred twenty-three thousand, seven hundred seven".