20111172026 has 16 divisors (see below), whose sum is σ = 32917848768. Its totient is φ = 9139036800.

The previous prime is 20111172017. The next prime is 20111172043. The reversal of 20111172026 is 62027111102.

It is a junction number, because it is equal to n+sod(n) for n = 20111171992 and 20111172010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33335 + ... + 203306.

It is an arithmetic number, because the mean of its divisors is an integer number (2057365548).

Almost surely, 2^20111172026 is an apocalyptic number.

20111172026 is a deficient number, since it is larger than the sum of its proper divisors (12806676742).

20111172026 is a wasteful number, since it uses less digits than its factorization.

20111172026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240517.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 20111172026 its reverse (62027111102), we get a palindrome (82138283128).

The spelling of 20111172026 in words is "twenty billion, one hundred eleven million, one hundred seventy-two thousand, twenty-six".