20150240042 has 16 divisors (see below), whose sum is σ = 30347262792. Its totient is φ = 10034542080.

The previous prime is 20150240021. The next prime is 20150240051. The reversal of 20150240042 is 24004205102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7281379561 + 12868860481 = 85331^2 + 113441^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20150239996 and 20150240023.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 743042 + ... + 769682.

Almost surely, 2^20150240042 is an apocalyptic number.

20150240042 is a deficient number, since it is larger than the sum of its proper divisors (10197022750).

20150240042 is a wasteful number, since it uses less digits than its factorization.

20150240042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28153.

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 20150240042 its reverse (24004205102), we get a palindrome (44154445144).

The spelling of 20150240042 in words is "twenty billion, one hundred fifty million, two hundred forty thousand, forty-two".