19942573 has 4 divisors (see below), whose sum is σ = 22791520. Its totient is φ = 17093628.

The previous prime is 19942567. The next prime is 19942591. The reversal of 19942573 is 37524991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 19942573 - 2¹⁷ = 19811501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19942543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1424463 + ... + 1424476.

It is an arithmetic number, because the mean of its divisors is an integer number (5697880).

Almost surely, 2^19942573 is an apocalyptic number.

It is an amenable number.

19942573 is a deficient number, since it is larger than the sum of its proper divisors (2848947).

19942573 is an equidigital number, since it uses as much as digits as its factorization.

19942573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848946.

The product of its digits is 68040, while the sum is 40.

The square root of 19942573 is about 4465.7108056837. The cubic root of 19942573 is about 271.1817111677.

The spelling of 19942573 in words is "nineteen million, nine hundred forty-two thousand, five hundred seventy-three".