20203101 has 10 divisors (see below), whose sum is σ = 30180062. Its totient is φ = 13468680.

The previous prime is 20203093. The next prime is 20203129. The reversal of 20203101 is 10130202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19131876 + 1071225 = 4374^2 + 1035^2 .

It is not a de Polignac number, because 20203101 - 2³ = 20203093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203151) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 124630 + ... + 124791.

Almost surely, 2^20203101 is an apocalyptic number.

It is an amenable number.

20203101 is a deficient number, since it is larger than the sum of its proper divisors (9976961).

20203101 is an equidigital number, since it uses as much as digits as its factorization.

20203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249433 (or 249424 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 20203101 is about 4494.7859793321. The cubic root of 20203101 is about 272.3575037046.

Adding to 20203101 its reverse (10130202), we get a palindrome (30333303).

The spelling of 20203101 in words is "twenty million, two hundred three thousand, one hundred one".