19730426 has 16 divisors (see below), whose sum is σ = 30257280. Its totient is φ = 9646560.

The previous prime is 19730419. The next prime is 19730437. The reversal of 19730426 is 62403791.

It is a junction number, because it is equal to n+sod(n) for n = 19730392 and 19730401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31670 + ... + 32286.

It is an arithmetic number, because the mean of its divisors is an integer number (1891080).

Almost surely, 2^19730426 is an apocalyptic number.

19730426 is a deficient number, since it is larger than the sum of its proper divisors (10526854).

19730426 is a wasteful number, since it uses less digits than its factorization.

19730426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 19730426 is about 4441.8944156745. The cubic root of 19730426 is about 270.2166802015.

The spelling of 19730426 in words is "nineteen million, seven hundred thirty thousand, four hundred twenty-six".