20144342242 has 4 divisors (see below), whose sum is σ = 30216513366. Its totient is φ = 10072171120.

The previous prime is 20144342227. The next prime is 20144342243. The reversal of 20144342242 is 24224344102.

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., 11614157361 + 8530184881 = 107769^2 + 92359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20144342242.

It is not an unprimeable number, because it can be changed into a prime (20144342243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5036085559 + ... + 5036085562.

Almost surely, 2^20144342242 is an apocalyptic number.

20144342242 is a deficient number, since it is larger than the sum of its proper divisors (10072171124).

20144342242 is a wasteful number, since it uses less digits than its factorization.

20144342242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10072171123.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20144342242 its reverse (24224344102), we get a palindrome (44368686344).

The spelling of 20144342242 in words is "twenty billion, one hundred forty-four million, three hundred forty-two thousand, two hundred forty-two".