20345095 has 16 divisors (see below), whose sum is σ = 25421760. Its totient is φ = 15611904.

The previous prime is 20345093. The next prime is 20345161. The reversal of 20345095 is 59054302.

20345095 = T₁₁₇₀ + T₁₁₇₁ + ... + T₁₁₉₈.

It is a 11-Lehmer number, since φ(20345095) divides (20345095-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 20345095 - 2¹ = 20345093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27622 + ... + 28348.

It is an arithmetic number, because the mean of its divisors is an integer number (1588860).

Almost surely, 2^20345095 is an apocalyptic number.

20345095 is a deficient number, since it is larger than the sum of its proper divisors (5076665).

20345095 is a wasteful number, since it uses less digits than its factorization.

20345095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 20345095 is about 4510.5537354077. The cubic root of 20345095 is about 272.9940871847.

Adding to 20345095 its reverse (59054302), we get a palindrome (79399397).

The spelling of 20345095 in words is "twenty million, three hundred forty-five thousand, ninety-five".