19950685 has 16 divisors (see below), whose sum is σ = 24494400. Its totient is φ = 15596416.

The previous prime is 19950661. The next prime is 19950691. The reversal of 19950685 is 58605991.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19950685 - 2¹⁵ = 19917917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47406 + ... + 47824.

It is an arithmetic number, because the mean of its divisors is an integer number (1530900).

Almost surely, 2^19950685 is an apocalyptic number.

It is an amenable number.

19950685 is a deficient number, since it is larger than the sum of its proper divisors (4543715).

19950685 is a wasteful number, since it uses less digits than its factorization.

19950685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 19950685 is about 4466.6189674070. The cubic root of 19950685 is about 271.2184755283.

The spelling of 19950685 in words is "nineteen million, nine hundred fifty thousand, six hundred eighty-five".