20135284 has 24 divisors (see below), whose sum is σ = 38596320. Its totient is φ = 9134304.

The previous prime is 20135267. The next prime is 20135321. The reversal of 20135284 is 48253102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214 + ... + 6349.

It is an arithmetic number, because the mean of its divisors is an integer number (1608180).

Almost surely, 2^20135284 is an apocalyptic number.

It is an amenable number.

20135284 is a deficient number, since it is larger than the sum of its proper divisors (18461036).

20135284 is a wasteful number, since it uses less digits than its factorization.

20135284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639 (or 6637 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20135284 is about 4487.2356746665. The cubic root of 20135284 is about 272.0524156483.

Adding to 20135284 its reverse (48253102), we get a palindrome (68388386).

The spelling of 20135284 in words is "twenty million, one hundred thirty-five thousand, two hundred eighty-four".