21200048 has 20 divisors (see below), whose sum is σ = 43237560. Its totient is φ = 10041984.

The previous prime is 21200041. The next prime is 21200051. The reversal of 21200048 is 84000212.

It is a junction number, because it is equal to n+sod(n) for n = 21199999 and 21200035.

It is not an unprimeable number, because it can be changed into a prime (21200041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34565 + ... + 35172.

It is an arithmetic number, because the mean of its divisors is an integer number (2161878).

Almost surely, 2^21200048 is an apocalyptic number.

It is an amenable number.

21200048 is an abundant number, since it is smaller than the sum of its proper divisors (22037512).

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

21200048 is a wasteful number, since it uses less digits than its factorization.

21200048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69764 (or 69758 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 21200048 is about 4604.3509857525. The cubic root of 21200048 is about 276.7657096084.

The spelling of 21200048 in words is "twenty-one million, two hundred thousand, forty-eight".