19941642 has 48 divisors (see below), whose sum is σ = 49900032. Its totient is φ = 5637600.

The previous prime is 19941641. The next prime is 19941643. The reversal of 19941642 is 24614991.

It is a happy number.

19941642 is a `hidden beast` number, since 1 + 9 + 9 + 4 + 1 + 642 = 666.

It is an interprime number because it is at equal distance from previous prime (19941641) and next prime (19941643).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 19941597 and 19941606.

It is not an unprimeable number, because it can be changed into a prime (19941641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11943 + ... + 13509.

It is an arithmetic number, because the mean of its divisors is an integer number (1039584).

Almost surely, 2^19941642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19941642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24950016).

19941642 is an abundant number, since it is smaller than the sum of its proper divisors (29958390).

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

19941642 is a wasteful number, since it uses less digits than its factorization.

19941642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683 (or 1680 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 19941642 is about 4465.6065657422. The cubic root of 19941642 is about 271.1774911488.

The spelling of 19941642 in words is "nineteen million, nine hundred forty-one thousand, six hundred forty-two".