20512042042 has 8 divisors (see below), whose sum is σ = 30768829632. Its totient is φ = 10255765500.

The previous prime is 20512042039. The next prime is 20512042049. The reversal of 20512042042 is 24024021502.

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 (20512042049) 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, 3084 + ... + 202567.

It is an arithmetic number, because the mean of its divisors is an integer number (3846103704).

Almost surely, 2^20512042042 is an apocalyptic number.

20512042042 is a deficient number, since it is larger than the sum of its proper divisors (10256787590).

20512042042 is a wasteful number, since it uses less digits than its factorization.

20512042042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255524.

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 20512042042 its reverse (24024021502), we get a palindrome (44536063544).

The spelling of 20512042042 in words is "twenty billion, five hundred twelve million, forty-two thousand, forty-two".