20438350142 has 8 divisors (see below), whose sum is σ = 35037171696. Its totient is φ = 8759292912.

The previous prime is 20438350139. The next prime is 20438350151. The reversal of 20438350142 is 24105383402.

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 = 20438350099 and 20438350108.

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, 729941063 + ... + 729941090.

It is an arithmetic number, because the mean of its divisors is an integer number (4379646462).

Almost surely, 2^20438350142 is an apocalyptic number.

20438350142 is a deficient number, since it is larger than the sum of its proper divisors (14598821554).

20438350142 is a wasteful number, since it uses less digits than its factorization.

20438350142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459882162.

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

The spelling of 20438350142 in words is "twenty billion, four hundred thirty-eight million, three hundred fifty thousand, one hundred forty-two".