142021344420 has 36 divisors (see below), whose sum is σ = 430798078620. Its totient is φ = 37872358464.

The previous prime is 142021344383. The next prime is 142021344463. The reversal of 142021344420 is 24443120241.

142021344420 is a `hidden beast` number, since 1 + 4 + 2 + 0 + 213 + 4 + 442 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 49906666404 + 92114678016 = 223398^2 + 303504^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 394503555 + ... + 394503914.

It is an arithmetic number, because the mean of its divisors is an integer number (11966613295).

Almost surely, 2^142021344420 is an apocalyptic number.

142021344420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142021344420 is an abundant number, since it is smaller than the sum of its proper divisors (288776734200).

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

142021344420 is a wasteful number, since it uses less digits than its factorization.

142021344420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789007484 (or 789007479 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 142021344420 its reverse (24443120241), we get a palindrome (166464464661).

The spelling of 142021344420 in words is "one hundred forty-two billion, twenty-one million, three hundred forty-four thousand, four hundred twenty".