20013200 has 30 divisors (see below), whose sum is σ = 48082674. Its totient is φ = 8005120.

The previous prime is 20013193. The next prime is 20013221. The reversal of 20013200 is 231002.

It can be written as a sum of positive squares in 3 ways, for example, as 50176 + 19963024 = 224^2 + 4468^2 .

It is a Harshad number since it is a multiple of its sum of digits (8).

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, 24617 + ... + 25416.

Almost surely, 2^20013200 is an apocalyptic number.

20013200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20013200 is an abundant number, since it is smaller than the sum of its proper divisors (28069474).

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

20013200 is a wasteful number, since it uses less digits than its factorization.

20013200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50051 (or 50040 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 20013200 is about 4473.6115164373. The cubic root of 20013200 is about 271.5014657141.

Adding to 20013200 its reverse (231002), we get a palindrome (20244202).

The spelling of 20013200 in words is "twenty million, thirteen thousand, two hundred".