21196134 has 64 divisors (see below), whose sum is σ = 50438400. Its totient is φ = 6578496.

The previous prime is 21196103. The next prime is 21196159. The reversal of 21196134 is 43169112.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21196098 and 21196107.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 74757 + ... + 75039.

It is an arithmetic number, because the mean of its divisors is an integer number (788100).

Almost surely, 2^21196134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21196134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25219200).

21196134 is an abundant number, since it is smaller than the sum of its proper divisors (29242266).

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

21196134 is a wasteful number, since it uses less digits than its factorization.

21196134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 380 counting only the distinct ones).

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

The square root of 21196134 is about 4603.9259333747. The cubic root of 21196134 is about 276.7486761932.

The spelling of 21196134 in words is "twenty-one million, one hundred ninety-six thousand, one hundred thirty-four".