20000020042 has 8 divisors (see below), whose sum is σ = 30000926916. Its totient is φ = 9999711072.

The previous prime is 20000020013. The next prime is 20000020043. The reversal of 20000020042 is 24002000002.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13747797001 + 6252223041 = 117251^2 + 79071^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20000020043) 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, 53533 + ... + 207040.

Almost surely, 2^20000020042 is an apocalyptic number.

20000020042 is a deficient number, since it is larger than the sum of its proper divisors (10000906874).

20000020042 is a wasteful number, since it uses less digits than its factorization.

20000020042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298952.

The product of its (nonzero) digits is 32, while the sum is 10.

Adding to 20000020042 its reverse (24002000002), we get a palindrome (44002020044).

The spelling of 20000020042 in words is "twenty billion, twenty thousand, forty-two".