19425906 has 24 divisors (see below), whose sum is σ = 43649424. Its totient is φ = 6475140.

The previous prime is 19425893. The next prime is 19425907. The reversal of 19425906 is 60952491.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (19425907) 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 in 11 ways as a sum of consecutive naturals, for example, 19500 + ... + 20471.

It is an arithmetic number, because the mean of its divisors is an integer number (1818726).

Almost surely, 2^19425906 is an apocalyptic number.

19425906 is an abundant number, since it is smaller than the sum of its proper divisors (24223518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19425906 is an equidigital number, since it uses as much as digits as its factorization.

19425906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39988 (or 39976 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 19425906 is about 4407.4829551571. The cubic root of 19425906 is about 268.8192887147.

The spelling of 19425906 in words is "nineteen million, four hundred twenty-five thousand, nine hundred six".