20031311242 has 16 divisors (see below), whose sum is σ = 31846399560. Its totient is φ = 9417028608.

The previous prime is 20031311239. The next prime is 20031311291. The reversal of 20031311242 is 24211313002.

It is a happy number.

20031311242 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16692898401 + 3338412841 = 129201^2 + 57779^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261567 + ... + 329362.

Almost surely, 2^20031311242 is an apocalyptic number.

20031311242 is a deficient number, since it is larger than the sum of its proper divisors (11815088318).

20031311242 is a wasteful number, since it uses less digits than its factorization.

20031311242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591945.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20031311242 its reverse (24211313002), we get a palindrome (44242624244).

The spelling of 20031311242 in words is "twenty billion, thirty-one million, three hundred eleven thousand, two hundred forty-two".