21413196 has 108 divisors (see below), whose sum is σ = 64318800. Its totient is φ = 5987520.

The previous prime is 21413191. The next prime is 21413221. The reversal of 21413196 is 69131412.

21413196 = 9² + 10² + ... + 400².

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (21413191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 107505 + ... + 107703.

Almost surely, 2^21413196 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 21413196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32159400).

21413196 is an abundant number, since it is smaller than the sum of its proper divisors (42905604).

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

21413196 is a wasteful number, since it uses less digits than its factorization.

21413196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284 (or 272 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 21413196 is about 4627.4394647580. The cubic root of 21413196 is about 277.6901642740.

It can be divided in two parts, 21413 and 196, that added together give a square (21609 = 147²).

The spelling of 21413196 in words is "twenty-one million, four hundred thirteen thousand, one hundred ninety-six".