19730636 has 12 divisors (see below), whose sum is σ = 35331912. Its totient is φ = 9635808.

The previous prime is 19730609. The next prime is 19730671. The reversal of 19730636 is 63603791.

It is a junction number, because it is equal to n+sod(n) for n = 19730596 and 19730605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57185 + ... + 57528.

It is an arithmetic number, because the mean of its divisors is an integer number (2944326).

Almost surely, 2^19730636 is an apocalyptic number.

It is an amenable number.

19730636 is a deficient number, since it is larger than the sum of its proper divisors (15601276).

19730636 is a wasteful number, since it uses less digits than its factorization.

19730636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114760 (or 114758 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 19730636 is about 4441.9180541743. The cubic root of 19730636 is about 270.2176388783.

The spelling of 19730636 in words is "nineteen million, seven hundred thirty thousand, six hundred thirty-six".