19401420407 has 2 divisors, whose sum is σ = 19401420408. Its totient is φ = 19401420406.

The previous prime is 19401420403. The next prime is 19401420419. The reversal of 19401420407 is 70402410491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19401420407 - 2² = 19401420403 is a prime.

It is a super-2 number, since 2×19401420407² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19401420403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9700710203 + 9700710204.

It is an arithmetic number, because the mean of its divisors is an integer number (9700710204).

Almost surely, 2^19401420407 is an apocalyptic number.

19401420407 is a deficient number, since it is larger than the sum of its proper divisors (1).

19401420407 is an equidigital number, since it uses as much as digits as its factorization.

19401420407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

Adding to 19401420407 its reverse (70402410491), we get a palindrome (89803830898).

The spelling of 19401420407 in words is "nineteen billion, four hundred one million, four hundred twenty thousand, four hundred seven".