20166144885 has 16 divisors (see below), whose sum is σ = 35850924480. Its totient is φ = 10755277200.

The previous prime is 20166144871. The next prime is 20166144899. The reversal of 20166144885 is 58844166102.

It is a happy number.

20166144885 is a `hidden beast` number, since 2 + 0 + 166 + 1 + 4 + 488 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (20166144871) and next prime (20166144899).

It is not a de Polignac number, because 20166144885 - 2¹⁵ = 20166112117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 20166144885.

It is a congruent number.

It is an unprimeable number.

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, 74689291 + ... + 74689560.

It is an arithmetic number, because the mean of its divisors is an integer number (2240682780).

Almost surely, 2^20166144885 is an apocalyptic number.

It is an amenable number.

20166144885 is a deficient number, since it is larger than the sum of its proper divisors (15684779595).

20166144885 is a wasteful number, since it uses less digits than its factorization.

20166144885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149378865 (or 149378859 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The spelling of 20166144885 in words is "twenty billion, one hundred sixty-six million, one hundred forty-four thousand, eight hundred eighty-five".