19914428 has 6 divisors (see below), whose sum is σ = 34850256. Its totient is φ = 9957212.

The previous prime is 19914371. The next prime is 19914449. The reversal of 19914428 is 82441991.

It is a junction number, because it is equal to n+sod(n) for n = 19914391 and 19914400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2489300 + ... + 2489307.

It is an arithmetic number, because the mean of its divisors is an integer number (5808376).

Almost surely, 2^19914428 is an apocalyptic number.

It is an amenable number.

19914428 is a deficient number, since it is larger than the sum of its proper divisors (14935828).

19914428 is a wasteful number, since it uses less digits than its factorization.

19914428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4978611 (or 4978609 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 19914428 is about 4462.5584590008. The cubic root of 19914428 is about 271.0540779777.

The spelling of 19914428 in words is "nineteen million, nine hundred fourteen thousand, four hundred twenty-eight".