20388101 has 4 divisors (see below), whose sum is σ = 20578752. Its totient is φ = 20197452.

The previous prime is 20388079. The next prime is 20388107. The reversal of 20388101 is 10188302.

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: 10188302 = 2 ⋅5094151.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20388101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20388107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95165 + ... + 95378.

It is an arithmetic number, because the mean of its divisors is an integer number (5144688).

Almost surely, 2^20388101 is an apocalyptic number.

It is an amenable number.

20388101 is a deficient number, since it is larger than the sum of its proper divisors (190651).

20388101 is a wasteful number, since it uses less digits than its factorization.

20388101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190650.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 20388101 is about 4515.3184826765. The cubic root of 20388101 is about 273.1863058503.

The spelling of 20388101 in words is "twenty million, three hundred eighty-eight thousand, one hundred one".