21194522 has 8 divisors (see below), whose sum is σ = 32042496. Its totient is φ = 10513692.

The previous prime is 21194513. The next prime is 21194527. The reversal of 21194522 is 22549112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21194491 and 21194500.

It is not an unprimeable number, because it can be changed into a prime (21194527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41468 + ... + 41975.

It is an arithmetic number, because the mean of its divisors is an integer number (4005312).

Almost surely, 2^21194522 is an apocalyptic number.

21194522 is a deficient number, since it is larger than the sum of its proper divisors (10847974).

21194522 is a wasteful number, since it uses less digits than its factorization.

21194522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83572.

The product of its digits is 1440, while the sum is 26.

The square root of 21194522 is about 4603.7508620689. The cubic root of 21194522 is about 276.7416602884.

The spelling of 21194522 in words is "twenty-one million, one hundred ninety-four thousand, five hundred twenty-two".