19801042 has 8 divisors (see below), whose sum is σ = 29825532. Its totient is φ = 9859200.

The previous prime is 19801037. The next prime is 19801051. The reversal of 19801042 is 24010891.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19633761 + 167281 = 4431^2 + 409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 19800998 and 19801016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20059 + ... + 21022.

Almost surely, 2^19801042 is an apocalyptic number.

19801042 is a deficient number, since it is larger than the sum of its proper divisors (10024490).

19801042 is a wasteful number, since it uses less digits than its factorization.

19801042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41324.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 19801042 is about 4449.8361767598. The cubic root of 19801042 is about 270.5386685460.

The spelling of 19801042 in words is "nineteen million, eight hundred one thousand, forty-two".