19940646 has 32 divisors (see below), whose sum is σ = 43670016. Its totient is φ = 6020000.

The previous prime is 19940621. The next prime is 19940659. The reversal of 19940646 is 64604991.

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, 28096 + ... + 28796.

It is an arithmetic number, because the mean of its divisors is an integer number (1364688).

Almost surely, 2^19940646 is an apocalyptic number.

19940646 is an abundant number, since it is smaller than the sum of its proper divisors (23729370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19940646 is a wasteful number, since it uses less digits than its factorization.

19940646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 19940646 is about 4465.4950453449. The cubic root of 19940646 is about 271.1729763538.

The spelling of 19940646 in words is "nineteen million, nine hundred forty thousand, six hundred forty-six".