21413255200 has 36 divisors (see below), whose sum is σ = 52275111210. Its totient is φ = 8565301760.

The previous prime is 21413255191. The next prime is 21413255251. The reversal of 21413255200 is 255231412.

It can be written as a sum of positive squares in 3 ways, for example, as 15696080656 + 5717174544 = 125284^2 + 75612^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 13382485 + ... + 13384084.

Almost surely, 2^21413255200 is an apocalyptic number.

21413255200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21413255200 is an abundant number, since it is smaller than the sum of its proper divisors (30861856010).

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

21413255200 is a wasteful number, since it uses less digits than its factorization.

21413255200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26766589 (or 26766576 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 21413255200 its reverse (255231412), we get a palindrome (21668486612).

The spelling of 21413255200 in words is "twenty-one billion, four hundred thirteen million, two hundred fifty-five thousand, two hundred".