20312214222440 has 64 divisors (see below), whose sum is σ = 52257151900800. Its totient is φ = 6960755213568.

The previous prime is 20312214222373. The next prime is 20312214222539. The reversal of 20312214222440 is 4422241221302.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17308574 + ... + 18444813.

It is an arithmetic number, because the mean of its divisors is an integer number (816517998450).

Almost surely, 2^{20312214222440} is an apocalyptic number.

20312214222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312214222440 is an abundant number, since it is smaller than the sum of its proper divisors (31944937678360).

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

20312214222440 is a wasteful number, since it uses less digits than its factorization.

20312214222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35755434 (or 35755430 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 20312214222440 its reverse (4422241221302), we get a palindrome (24734455443742).

The spelling of 20312214222440 in words is "twenty trillion, three hundred twelve billion, two hundred fourteen million, two hundred twenty-two thousand, four hundred forty".