19420867 has 2 divisors, whose sum is σ = 19420868. Its totient is φ = 19420866.

The previous prime is 19420837. The next prime is 19420871. The reversal of 19420867 is 76802491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19420867 - 2¹⁵ = 19388099 is a prime.

It is not a weakly prime, because it can be changed into another prime (19420837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9710433 + 9710434.

It is an arithmetic number, because the mean of its divisors is an integer number (9710434).

Almost surely, 2^19420867 is an apocalyptic number.

19420867 is a deficient number, since it is larger than the sum of its proper divisors (1).

19420867 is an equidigital number, since it uses as much as digits as its factorization.

19420867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 19420867 is about 4406.9112766199. The cubic root of 19420867 is about 268.7960431659.

The spelling of 19420867 in words is "nineteen million, four hundred twenty thousand, eight hundred sixty-seven".