19669967 has 2 divisors, whose sum is σ = 19669968. Its totient is φ = 19669966.

The previous prime is 19669957. The next prime is 19669987. The reversal of 19669967 is 76996691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19669967 - 2¹² = 19665871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19669907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9834983 + 9834984.

It is an arithmetic number, because the mean of its divisors is an integer number (9834984).

Almost surely, 2^19669967 is an apocalyptic number.

19669967 is a deficient number, since it is larger than the sum of its proper divisors (1).

19669967 is an equidigital number, since it uses as much as digits as its factorization.

19669967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 19669967 is about 4435.0836519732. The cubic root of 19669967 is about 269.9403937922.

The spelling of 19669967 in words is "nineteen million, six hundred sixty-nine thousand, nine hundred sixty-seven".