20534320042 has 8 divisors (see below), whose sum is σ = 30971654532. Its totient is φ = 10210435200.

The previous prime is 20534319997. The next prime is 20534320073. The reversal of 20534320042 is 24002343502.

It can be written as a sum of positive squares in 2 ways, for example, as 16228466881 + 4305853161 = 127391^2 + 65619^2 .

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 = 20534319989 and 20534320016.

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, 28361959 + ... + 28362682.

Almost surely, 2^20534320042 is an apocalyptic number.

20534320042 is a deficient number, since it is larger than the sum of its proper divisors (10437334490).

20534320042 is a wasteful number, since it uses less digits than its factorization.

20534320042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56724824.

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 20534320042 its reverse (24002343502), we get a palindrome (44536663544).

The spelling of 20534320042 in words is "twenty billion, five hundred thirty-four million, three hundred twenty thousand, forty-two".