19942331 has 4 divisors (see below), whose sum is σ = 20585664. Its totient is φ = 19299000.

The previous prime is 19942291. The next prime is 19942333. The reversal of 19942331 is 13324991.

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

It is a cyclic number.

It is not a de Polignac number, because 19942331 - 2¹⁴ = 19925947 is a prime.

It is a super-2 number, since 2×19942331² = 795393131427122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19942333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321620 + ... + 321681.

It is an arithmetic number, because the mean of its divisors is an integer number (5146416).

Almost surely, 2^19942331 is an apocalyptic number.

19942331 is a deficient number, since it is larger than the sum of its proper divisors (643333).

19942331 is an equidigital number, since it uses as much as digits as its factorization.

19942331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643332.

The product of its digits is 5832, while the sum is 32.

The square root of 19942331 is about 4465.6837102509. The cubic root of 19942331 is about 271.1806142474.

The spelling of 19942331 in words is "nineteen million, nine hundred forty-two thousand, three hundred thirty-one".