20420304042 has 8 divisors (see below), whose sum is σ = 40840608096. Its totient is φ = 6806768012.

The previous prime is 20420304029. The next prime is 20420304049. The reversal of 20420304042 is 24040302402.

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

20420304042 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (20420304049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1701691998 + ... + 1701692009.

It is an arithmetic number, because the mean of its divisors is an integer number (5105076012).

Almost surely, 2^20420304042 is an apocalyptic number.

20420304042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20420304042 is a wasteful number, since it uses less digits than its factorization.

20420304042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403384012.

The product of its (nonzero) digits is 1536, while the sum is 21.

Adding to 20420304042 its reverse (24040302402), we get a palindrome (44460606444).

The spelling of 20420304042 in words is "twenty billion, four hundred twenty million, three hundred four thousand, forty-two".