20271513 has 8 divisors (see below), whose sum is σ = 27137376. Its totient is φ = 13460000.

The previous prime is 20271491. The next prime is 20271521. The reversal of 20271513 is 31517202.

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

It is a cyclic number.

It is not a de Polignac number, because 20271513 - 2⁵ = 20271481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20271513.

It is not an unprimeable number, because it can be changed into a prime (20271583) 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, 12708 + ... + 14213.

It is an arithmetic number, because the mean of its divisors is an integer number (3392172).

Almost surely, 2^20271513 is an apocalyptic number.

It is an amenable number.

20271513 is a deficient number, since it is larger than the sum of its proper divisors (6865863).

20271513 is a wasteful number, since it uses less digits than its factorization.

20271513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27175.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20271513 is about 4502.3896988155. The cubic root of 20271513 is about 272.6645775179.

Adding to 20271513 its reverse (31517202), we get a palindrome (51788715).

The spelling of 20271513 in words is "twenty million, two hundred seventy-one thousand, five hundred thirteen".