20606101 has 4 divisors (see below), whose sum is σ = 20649600. Its totient is φ = 20562604.

The previous prime is 20606099. The next prime is 20606119. The reversal of 20606101 is 10160602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10160602 = 2 ⋅5080301.

It is a cyclic number.

It is not a de Polignac number, because 20606101 - 2¹ = 20606099 is a prime.

It is a super-2 number, since 2×20606101² = 849222796844402, 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 (20606141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21031 + ... + 21988.

It is an arithmetic number, because the mean of its divisors is an integer number (5162400).

Almost surely, 2^20606101 is an apocalyptic number.

It is an amenable number.

20606101 is a deficient number, since it is larger than the sum of its proper divisors (43499).

20606101 is an equidigital number, since it uses as much as digits as its factorization.

20606101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43498.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 20606101 is about 4539.3943428612. The cubic root of 20606101 is about 274.1565385016.

Adding to 20606101 its reverse (10160602), we get a palindrome (30766703).

The spelling of 20606101 in words is "twenty million, six hundred six thousand, one hundred one".