20135208 has 48 divisors (see below), whose sum is σ = 53491680. Its totient is φ = 6314752.

The previous prime is 20135207. The next prime is 20135221. The reversal of 20135208 is 80253102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5485 + ... + 8387.

It is an arithmetic number, because the mean of its divisors is an integer number (1114410).

Almost surely, 2^20135208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20135208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26745840).

20135208 is an abundant number, since it is smaller than the sum of its proper divisors (33356472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20135208 is a wasteful number, since it uses less digits than its factorization.

20135208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 2925 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20135208 is about 4487.2272061932. The cubic root of 20135208 is about 272.0520733635.

The spelling of 20135208 in words is "twenty million, one hundred thirty-five thousand, two hundred eight".