19939946 has 32 divisors (see below), whose sum is σ = 34428240. Its totient is φ = 8580096.

The previous prime is 19939943. The next prime is 19939951. The reversal of 19939946 is 64993991.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 18705625 + 1234321 = 4325^2 + 1111^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19939894 and 19939903.

It is not an unprimeable number, because it can be changed into a prime (19939943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86960 + ... + 87188.

Almost surely, 2^19939946 is an apocalyptic number.

19939946 is a deficient number, since it is larger than the sum of its proper divisors (14488294).

19939946 is a wasteful number, since it uses less digits than its factorization.

19939946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458.

The product of its digits is 472392, while the sum is 50.

The square root of 19939946 is about 4465.4166658891. The cubic root of 19939946 is about 271.1698032151.

The spelling of 19939946 in words is "nineteen million, nine hundred thirty-nine thousand, nine hundred forty-six".