20311404223242 has 16 divisors (see below), whose sum is σ = 44315791032672. Its totient is φ = 6154970976720.

The previous prime is 20311404223217. The next prime is 20311404223247. The reversal of 20311404223242 is 24232240411302.

It is not an unprimeable number, because it can be changed into a prime (20311404223247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153874274353 + ... + 153874274484.

It is an arithmetic number, because the mean of its divisors is an integer number (2769736939542).

Almost surely, 2^{20311404223242} is an apocalyptic number.

20311404223242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20311404223242 is an abundant number, since it is smaller than the sum of its proper divisors (24004386809430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20311404223242 is a wasteful number, since it uses less digits than its factorization.

20311404223242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307748548853.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 20311404223242 its reverse (24232240411302), we get a palindrome (44543644634544).

The spelling of 20311404223242 in words is "twenty trillion, three hundred eleven billion, four hundred four million, two hundred twenty-three thousand, two hundred forty-two".