20143231403220 has 72 divisors (see below), whose sum is σ = 61102361325096. Its totient is φ = 5371420588032.

The previous prime is 20143231403219. The next prime is 20143231403293. The reversal of 20143231403220 is 2230413234102.

20143231403220 is a `hidden beast` number, since 2 + 0 + 1 + 4 + 3 + 2 + 31 + 403 + 220 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3235444002756 + 16907787400464 = 1798734^2 + 4111908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8081464 + ... + 10276016.

It is an arithmetic number, because the mean of its divisors is an integer number (848643907293).

Almost surely, 2^{20143231403220} is an apocalyptic number.

20143231403220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20143231403220 is an abundant number, since it is smaller than the sum of its proper divisors (40959129921876).

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

20143231403220 is a wasteful number, since it uses less digits than its factorization.

20143231403220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245561 (or 2245556 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 20143231403220 its reverse (2230413234102), we get a palindrome (22373644637322).

The spelling of 20143231403220 in words is "twenty trillion, one hundred forty-three billion, two hundred thirty-one million, four hundred three thousand, two hundred twenty".