21194160 has 80 divisors (see below), whose sum is σ = 70766304. Its totient is φ = 5216256.

The previous prime is 21194149. The next prime is 21194197. The reversal of 21194160 is 6149112.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 21194160.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277 + ... + 6516.

Almost surely, 2^21194160 is an apocalyptic number.

21194160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21194160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35383152).

21194160 is an abundant number, since it is smaller than the sum of its proper divisors (49572144).

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

21194160 is a wasteful number, since it uses less digits than its factorization.

21194160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6822 (or 6816 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21194160 is about 4603.7115461332. The cubic root of 21194160 is about 276.7400847075.

The spelling of 21194160 in words is "twenty-one million, one hundred ninety-four thousand, one hundred sixty".