19428207 has 4 divisors (see below), whose sum is σ = 25904280. Its totient is φ = 12952136.

The previous prime is 19428197. The next prime is 19428209. The reversal of 19428207 is 70282491.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19428207 - 2¹⁶ = 19362671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19428209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3238032 + ... + 3238037.

It is an arithmetic number, because the mean of its divisors is an integer number (6476070).

Almost surely, 2^19428207 is an apocalyptic number.

19428207 is a deficient number, since it is larger than the sum of its proper divisors (6476073).

19428207 is an equidigital number, since it uses as much as digits as its factorization.

19428207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6476072.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 19428207 is about 4407.7439807684. The cubic root of 19428207 is about 268.8299021838.

The spelling of 19428207 in words is "nineteen million, four hundred twenty-eight thousand, two hundred seven".