20187211105235 has 16 divisors (see below), whose sum is σ = 24236828328096. Its totient is φ = 16141653508608.

The previous prime is 20187211105207. The next prime is 20187211105267. The reversal of 20187211105235 is 53250111278102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20187211105235 - 2²² = 20187206910931 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136314089 + ... + 136462101.

It is an arithmetic number, because the mean of its divisors is an integer number (1514801770506).

Almost surely, 2^{20187211105235} is an apocalyptic number.

20187211105235 is a deficient number, since it is larger than the sum of its proper divisors (4049617222861).

20187211105235 is a wasteful number, since it uses less digits than its factorization.

20187211105235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161542.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 20187211105235 in words is "twenty trillion, one hundred eighty-seven billion, two hundred eleven million, one hundred five thousand, two hundred thirty-five".