20513200 has 30 divisors (see below), whose sum is σ = 49283924. Its totient is φ = 8205120.

The previous prime is 20513191. The next prime is 20513231. The reversal of 20513200 is 231502.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25242 + ... + 26041.

Almost surely, 2^20513200 is an apocalyptic number.

20513200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20513200 is an abundant number, since it is smaller than the sum of its proper divisors (28770724).

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

20513200 is a wasteful number, since it uses less digits than its factorization.

20513200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51301 (or 51290 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 20513200 is about 4529.1500306349. The cubic root of 20513200 is about 273.7439133221.

Adding to 20513200 its reverse (231502), we get a palindrome (20744702).

The spelling of 20513200 in words is "twenty million, five hundred thirteen thousand, two hundred".