19955642 has 24 divisors (see below), whose sum is σ = 35069364. Its totient is φ = 8491392.

The previous prime is 19955641. The next prime is 19955647. The reversal of 19955642 is 24655991.

It can be written as a sum of positive squares in 2 ways, for example, as 18653761 + 1301881 = 4319^2 + 1141^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 19955642.

It is not an unprimeable number, because it can be changed into a prime (19955641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14738 + ... + 16034.

Almost surely, 2^19955642 is an apocalyptic number.

19955642 is a deficient number, since it is larger than the sum of its proper divisors (15113722).

19955642 is a wasteful number, since it uses less digits than its factorization.

19955642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1470 (or 1463 counting only the distinct ones).

The product of its digits is 97200, while the sum is 41.

The square root of 19955642 is about 4467.1738269291. The cubic root of 19955642 is about 271.2409362216.

The spelling of 19955642 in words is "nineteen million, nine hundred fifty-five thousand, six hundred forty-two".