20042051105 has 16 divisors (see below), whose sum is σ = 25357380480. Its totient is φ = 15165101952.

The previous prime is 20042051101. The next prime is 20042051131. The reversal of 20042051105 is 50115024002.

It is a cyclic number.

It is not a de Polignac number, because 20042051105 - 2² = 20042051101 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20042051101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112349 + ... + 229578.

It is an arithmetic number, because the mean of its divisors is an integer number (1584836280).

Almost surely, 2^20042051105 is an apocalyptic number.

It is an amenable number.

20042051105 is a deficient number, since it is larger than the sum of its proper divisors (5315329375).

20042051105 is a wasteful number, since it uses less digits than its factorization.

20042051105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342568.

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 20042051105 its reverse (50115024002), we get a palindrome (70157075107).

The spelling of 20042051105 in words is "twenty billion, forty-two million, fifty-one thousand, one hundred five".