19930234 has 4 divisors (see below), whose sum is σ = 29895354. Its totient is φ = 9965116.

The previous prime is 19930231. The next prime is 19930243. The reversal of 19930234 is 43203991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43203991 = 719 ⋅60089.

It can be written as a sum of positive squares in only one way, i.e., 17665209 + 2265025 = 4203^2 + 1505^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19930196 and 19930205.

It is not an unprimeable number, because it can be changed into a prime (19930231) 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 as a sum of consecutive naturals, namely, 4982557 + ... + 4982560.

Almost surely, 2^19930234 is an apocalyptic number.

19930234 is a deficient number, since it is larger than the sum of its proper divisors (9965120).

19930234 is an equidigital number, since it uses as much as digits as its factorization.

19930234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9965119.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 19930234 is about 4464.3290649324. The cubic root of 19930234 is about 271.1257705178.

It can be divided in two parts, 19930 and 234, that added together give a square (20164 = 142²).

The spelling of 19930234 in words is "nineteen million, nine hundred thirty thousand, two hundred thirty-four".