20205101 has 8 divisors (see below), whose sum is σ = 23563200. Its totient is φ = 17318364.

The previous prime is 20205077. The next prime is 20205103. The reversal of 20205101 is 10150202.

It is not a de Polignac number, because 20205101 - 2¹⁸ = 19942957 is a prime.

It is a super-2 number, since 2×20205101² = 816492212840402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20205103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29111 + ... + 29796.

It is an arithmetic number, because the mean of its divisors is an integer number (2945400).

Almost surely, 2^20205101 is an apocalyptic number.

It is an amenable number.

20205101 is a deficient number, since it is larger than the sum of its proper divisors (3358099).

20205101 is an frugal number, since it uses more digits than its factorization.

20205101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58928 (or 58914 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 20205101 is about 4495.0084538296. The cubic root of 20205101 is about 272.3664907249.

Adding to 20205101 its reverse (10150202), we get a palindrome (30355303).

The spelling of 20205101 in words is "twenty million, two hundred five thousand, one hundred one".