21194108 has 12 divisors (see below), whose sum is σ = 39942840. Its totient is φ = 9781872.

The previous prime is 21194093. The next prime is 21194113. The reversal of 21194108 is 80149112.

It is a Harshad number since it is a multiple of its sum of digits (26).

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 3 ways as a sum of consecutive naturals, for example, 203738 + ... + 203841.

It is an arithmetic number, because the mean of its divisors is an integer number (3328570).

Almost surely, 2^21194108 is an apocalyptic number.

It is an amenable number.

21194108 is a deficient number, since it is larger than the sum of its proper divisors (18748732).

21194108 is a wasteful number, since it uses less digits than its factorization.

21194108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407596 (or 407594 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 21194108 is about 4603.7058985126. The cubic root of 21194108 is about 276.7398583795.

The spelling of 21194108 in words is "twenty-one million, one hundred ninety-four thousand, one hundred eight".