20142185885 has 12 divisors (see below), whose sum is σ = 24231674388. Its totient is φ = 16073073408.

The previous prime is 20142185863. The next prime is 20142185927. The reversal of 20142185885 is 58858124102.

It can be written as a sum of positive squares in 6 ways, for example, as 5938551844 + 14203634041 = 77062^2 + 119179^2 .

It is not a de Polignac number, because 20142185885 - 2¹⁰ = 20142184861 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 6782681 + ... + 6785649.

It is an arithmetic number, because the mean of its divisors is an integer number (2019306199).

Almost surely, 2^20142185885 is an apocalyptic number.

It is an amenable number.

20142185885 is a deficient number, since it is larger than the sum of its proper divisors (4089488503).

20142185885 is an frugal number, since it uses more digits than its factorization.

20142185885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400 (or 3431 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 44.

The spelling of 20142185885 in words is "twenty billion, one hundred forty-two million, one hundred eighty-five thousand, eight hundred eighty-five".