19442849 has 4 divisors (see below), whose sum is σ = 20586564. Its totient is φ = 18299136.

The previous prime is 19442831. The next prime is 19442867. The reversal of 19442849 is 94824491.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (19442831) and next prime (19442867).

It can be written as a sum of positive squares in 2 ways, for example, as 16443025 + 2999824 = 4055^2 + 1732^2 .

It is a cyclic number.

It is not a de Polignac number, because 19442849 - 2¹² = 19438753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19442809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571832 + ... + 571865.

It is an arithmetic number, because the mean of its divisors is an integer number (5146641).

Almost surely, 2^19442849 is an apocalyptic number.

It is an amenable number.

19442849 is a deficient number, since it is larger than the sum of its proper divisors (1143715).

19442849 is a wasteful number, since it uses less digits than its factorization.

19442849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143714.

The product of its digits is 82944, while the sum is 41.

The square root of 19442849 is about 4409.4046083343. The cubic root of 19442849 is about 268.8974194626.

The spelling of 19442849 in words is "nineteen million, four hundred forty-two thousand, eight hundred forty-nine".