20533840142 has 8 divisors (see below), whose sum is σ = 31260473256. Its totient is φ = 10113682392.

The previous prime is 20533840097. The next prime is 20533840153. The reversal of 20533840142 is 24104833502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20533840099 and 20533840108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76618673 + ... + 76618940.

It is an arithmetic number, because the mean of its divisors is an integer number (3907559157).

Almost surely, 2^20533840142 is an apocalyptic number.

20533840142 is a deficient number, since it is larger than the sum of its proper divisors (10726633114).

20533840142 is a wasteful number, since it uses less digits than its factorization.

20533840142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153237682.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 20533840142 in words is "twenty billion, five hundred thirty-three million, eight hundred forty thousand, one hundred forty-two".