20513095 has 8 divisors (see below), whose sum is σ = 24641280. Its totient is φ = 16393440.

The previous prime is 20513093. The next prime is 20513113. The reversal of 20513095 is 59031502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20513095 - 2¹ = 20513093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20513093) 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, 5961 + ... + 8749.

It is an arithmetic number, because the mean of its divisors is an integer number (3080160).

Almost surely, 2^20513095 is an apocalyptic number.

20513095 is a deficient number, since it is larger than the sum of its proper divisors (4128185).

20513095 is a wasteful number, since it uses less digits than its factorization.

20513095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20513095 is about 4529.1384390411. The cubic root of 20513095 is about 273.7434462544.

Adding to 20513095 its reverse (59031502), we get a palindrome (79544597).

The spelling of 20513095 in words is "twenty million, five hundred thirteen thousand, ninety-five".