20185144101 has 24 divisors (see below), whose sum is σ = 29379168000. Its totient is φ = 13354092000.

The previous prime is 20185144099. The next prime is 20185144121. The reversal of 20185144101 is 10144158102.

It is a happy number.

It is not a de Polignac number, because 20185144101 - 2¹ = 20185144099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20185144121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1434900 + ... + 1448898.

It is an arithmetic number, because the mean of its divisors is an integer number (1224132000).

Almost surely, 2^20185144101 is an apocalyptic number.

It is an amenable number.

20185144101 is a deficient number, since it is larger than the sum of its proper divisors (9194023899).

20185144101 is a wasteful number, since it uses less digits than its factorization.

20185144101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15217 (or 15214 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The spelling of 20185144101 in words is "twenty billion, one hundred eighty-five million, one hundred forty-four thousand, one hundred one".