20713135 has 16 divisors (see below), whose sum is σ = 26726400. Its totient is φ = 15361056.

The previous prime is 20713129. The next prime is 20713139. The reversal of 20713135 is 53131702.

It is a cyclic number.

It is not a de Polignac number, because 20713135 - 2³ = 20713127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20713139) 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, 2146 + ... + 6784.

It is an arithmetic number, because the mean of its divisors is an integer number (1670400).

Almost surely, 2^20713135 is an apocalyptic number.

20713135 is a deficient number, since it is larger than the sum of its proper divisors (6013265).

20713135 is a wasteful number, since it uses less digits than its factorization.

20713135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4710.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 20713135 is about 4551.1685312675. The cubic root of 20713135 is about 274.6304015559.

Adding to 20713135 its reverse (53131702), we get a palindrome (73844837).

The spelling of 20713135 in words is "twenty million, seven hundred thirteen thousand, one hundred thirty-five".