19442001 has 16 divisors (see below), whose sum is σ = 26587008. Its totient is φ = 12633600.

The previous prime is 19441963. The next prime is 19442009. The reversal of 19442001 is 10024491.

It is not a de Polignac number, because 19442001 - 2¹⁵ = 19409233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19442009) 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, 20191 + ... + 21131.

It is an arithmetic number, because the mean of its divisors is an integer number (1661688).

Almost surely, 2^19442001 is an apocalyptic number.

It is an amenable number.

19442001 is a deficient number, since it is larger than the sum of its proper divisors (7145007).

19442001 is an equidigital number, since it uses as much as digits as its factorization.

19442001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 19442001 is about 4409.3084491789. The cubic root of 19442001 is about 268.8935100848.

Adding to 19442001 its reverse (10024491), we get a palindrome (29466492).

It can be divided in two parts, 194 and 42001, that added together give a triangular number (42195 = T₂₉₀).

The spelling of 19442001 in words is "nineteen million, four hundred forty-two thousand, one".