20011166042 has 16 divisors (see below), whose sum is σ = 34306856640. Its totient is φ = 8575713888.

The previous prime is 20011166041. The next prime is 20011166053. The reversal of 20011166042 is 24066111002.

It is a junction number, because it is equal to n+sod(n) for n = 20011165999 and 20011166017.

It is not an unprimeable number, because it can be changed into a prime (20011166041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308309 + ... + 367527.

It is an arithmetic number, because the mean of its divisors is an integer number (2144178540).

Almost surely, 2^20011166042 is an apocalyptic number.

20011166042 is a deficient number, since it is larger than the sum of its proper divisors (14295690598).

20011166042 is a wasteful number, since it uses less digits than its factorization.

20011166042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83365.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 20011166042 its reverse (24066111002), we get a palindrome (44077277044).

The spelling of 20011166042 in words is "twenty billion, eleven million, one hundred sixty-six thousand, forty-two".