19949684 has 12 divisors (see below), whose sum is σ = 35484708. Its totient is φ = 9811200.

The previous prime is 19949669. The next prime is 19949689. The reversal of 19949684 is 48694991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3724900 + 16224784 = 1930^2 + 4028^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19949689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40637 + ... + 41124.

It is an arithmetic number, because the mean of its divisors is an integer number (2957059).

Almost surely, 2^19949684 is an apocalyptic number.

It is an amenable number.

19949684 is a deficient number, since it is larger than the sum of its proper divisors (15535024).

19949684 is a wasteful number, since it uses less digits than its factorization.

19949684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81826 (or 81824 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 19949684 is about 4466.5069125660. The cubic root of 19949684 is about 271.2139394395.

The spelling of 19949684 in words is "nineteen million, nine hundred forty-nine thousand, six hundred eighty-four".