20165622111 has 16 divisors (see below), whose sum is σ = 29881144320. Its totient is φ = 13440981240.

The previous prime is 20165622107. The next prime is 20165622133. The reversal of 20165622111 is 11122656102.

20165622111 is a `hidden beast` number, since 2 + 0 + 1 + 656 + 2 + 2 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 20165622111 - 2² = 20165622107 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20165622101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61276 + ... + 209966.

It is an arithmetic number, because the mean of its divisors is an integer number (1867571520).

Almost surely, 2^20165622111 is an apocalyptic number.

20165622111 is a deficient number, since it is larger than the sum of its proper divisors (9715522209).

20165622111 is a wasteful number, since it uses less digits than its factorization.

20165622111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153723 (or 153717 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 20165622111 in words is "twenty billion, one hundred sixty-five million, six hundred twenty-two thousand, one hundred eleven".