20315135 has 16 divisors (see below), whose sum is σ = 25370400. Its totient is φ = 15603840.

The previous prime is 20315129. The next prime is 20315143. The reversal of 20315135 is 53151302.

It is not a de Polignac number, because 20315135 - 2¹⁶ = 20249599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12341 + ... + 13889.

It is an arithmetic number, because the mean of its divisors is an integer number (1585650).

Almost surely, 2^20315135 is an apocalyptic number.

20315135 is a deficient number, since it is larger than the sum of its proper divisors (5055265).

20315135 is a wasteful number, since it uses less digits than its factorization.

20315135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 20315135 is about 4507.2314118536. The cubic root of 20315135 is about 272.8600184921.

Adding to 20315135 its reverse (53151302), we get a palindrome (73466437).

The spelling of 20315135 in words is "twenty million, three hundred fifteen thousand, one hundred thirty-five".