20345101 has 4 divisors (see below), whose sum is σ = 23251552. Its totient is φ = 17438652.

The previous prime is 20345093. The next prime is 20345161. The reversal of 20345101 is 10154302.

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: 10154302 = 2 ⋅5077151.

It is not a de Polignac number, because 20345101 - 2³ = 20345093 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 (20345161) 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, 1453215 + ... + 1453228.

It is an arithmetic number, because the mean of its divisors is an integer number (5812888).

Almost surely, 2^20345101 is an apocalyptic number.

It is an amenable number.

20345101 is a deficient number, since it is larger than the sum of its proper divisors (2906451).

20345101 is an equidigital number, since it uses as much as digits as its factorization.

20345101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906450.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 20345101 is about 4510.5544005144. The cubic root of 20345101 is about 272.9941140211.

Adding to 20345101 its reverse (10154302), we get a palindrome (30499403).

The spelling of 20345101 in words is "twenty million, three hundred forty-five thousand, one hundred one".