142021443440 has 20 divisors (see below), whose sum is σ = 330199856184. Its totient is φ = 56808577344.

The previous prime is 142021443439. The next prime is 142021443461. The reversal of 142021443440 is 44344120241.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×142021443440² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887633942 + ... + 887634101.

Almost surely, 2^142021443440 is an apocalyptic number.

142021443440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

142021443440 is an abundant number, since it is smaller than the sum of its proper divisors (188178412744).

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

142021443440 is a wasteful number, since it uses less digits than its factorization.

142021443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775268056 (or 1775268050 counting only the distinct ones).

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

Adding to 142021443440 its reverse (44344120241), we get a palindrome (186365563681).

The spelling of 142021443440 in words is "one hundred forty-two billion, twenty-one million, four hundred forty-three thousand, four hundred forty".