21194136 has 40 divisors (see below), whose sum is σ = 59365020. Its totient is φ = 7064496.

The previous prime is 21194123. The next prime is 21194149. The reversal of 21194136 is 63149112.

It is an interprime number because it is at equal distance from previous prime (21194123) and next prime (21194149).

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

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

It is a congruent number.

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 9 ways as a sum of consecutive naturals, for example, 15706 + ... + 17001.

Almost surely, 2^21194136 is an apocalyptic number.

It is an amenable number.

21194136 is an abundant number, since it is smaller than the sum of its proper divisors (38170884).

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

21194136 is a wasteful number, since it uses less digits than its factorization.

21194136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32725 (or 32712 counting only the distinct ones).

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

The square root of 21194136 is about 4603.7089395399. The cubic root of 21194136 is about 276.7399802484.

The spelling of 21194136 in words is "twenty-one million, one hundred ninety-four thousand, one hundred thirty-six".