10019919 has 48 divisors (see below), whose sum is σ = 17604608. Its totient is φ = 4935168.

The previous prime is 10019909. The next prime is 10019923. The reversal of 10019919 is 91991001.

10019919 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10019919 - 2⁷ = 10019791 is a prime.

It is a super-2 number, since 2×10019919² = 200797553533122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10019909) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78834 + ... + 78960.

Almost surely, 2^10019919 is an apocalyptic number.

10019919 is a deficient number, since it is larger than the sum of its proper divisors (7584689).

10019919 is a wasteful number, since it uses less digits than its factorization.

10019919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 30.

The square root of 10019919 is about 3165.4255638065. The cubic root of 10019919 is about 215.5864214115.

The spelling of 10019919 in words is "ten million, nineteen thousand, nine hundred nineteen".