42444320234 has 4 divisors (see below), whose sum is σ = 63666480354. Its totient is φ = 21222160116.

The previous prime is 42444320231. The next prime is 42444320263. The reversal of 42444320234 is 43202344424.

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

It can be written as a sum of positive squares in only one way, i.e., 28175301025 + 14269019209 = 167855^2 + 119453^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42444320234.

It is not an unprimeable number, because it can be changed into a prime (42444320231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611080057 + ... + 10611080060.

Almost surely, 2^42444320234 is an apocalyptic number.

42444320234 is a deficient number, since it is larger than the sum of its proper divisors (21222160120).

42444320234 is a wasteful number, since it uses less digits than its factorization.

42444320234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21222160119.

The product of its (nonzero) digits is 73728, while the sum is 32.

Adding to 42444320234 its reverse (43202344424), we get a palindrome (85646664658).

The spelling of 42444320234 in words is "forty-two billion, four hundred forty-four million, three hundred twenty thousand, two hundred thirty-four".