20285103101 has 4 divisors (see below), whose sum is σ = 20289404604. Its totient is φ = 20280801600.

The previous prime is 20285103089. The next prime is 20285103149. The reversal of 20285103101 is 10130158202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10130158202 = 2 ⋅5065079101.

It can be written as a sum of positive squares in 2 ways, for example, as 16836360025 + 3448743076 = 129755^2 + 58726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20285103101 is a prime.

It is a super-2 number, since 2×20285103101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20285103401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2143670 + ... + 2153111.

It is an arithmetic number, because the mean of its divisors is an integer number (5072351151).

Almost surely, 2^20285103101 is an apocalyptic number.

It is an amenable number.

20285103101 is a deficient number, since it is larger than the sum of its proper divisors (4301503).

20285103101 is an equidigital number, since it uses as much as digits as its factorization.

20285103101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301502.

The product of its (nonzero) digits is 480, while the sum is 23.

The spelling of 20285103101 in words is "twenty billion, two hundred eighty-five million, one hundred three thousand, one hundred one".