19429916 has 24 divisors (see below), whose sum is σ = 37449216. Its totient is φ = 8747120.

The previous prime is 19429897. The next prime is 19429957. The reversal of 19429916 is 61992491.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2645 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (1560384).

Almost surely, 2^19429916 is an apocalyptic number.

It is an amenable number.

19429916 is a deficient number, since it is larger than the sum of its proper divisors (18019300).

19429916 is a wasteful number, since it uses less digits than its factorization.

19429916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249 (or 4247 counting only the distinct ones).

The product of its digits is 34992, while the sum is 41.

The square root of 19429916 is about 4407.9378398521. The cubic root of 19429916 is about 268.8377844832.

The spelling of 19429916 in words is "nineteen million, four hundred twenty-nine thousand, nine hundred sixteen".