21886604 has 6 divisors (see below), whose sum is σ = 38301564. Its totient is φ = 10943300.

The previous prime is 21886603. The next prime is 21886607. The reversal of 21886604 is 40668812.

It is not an unprimeable number, because it can be changed into a prime (21886603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2735822 + ... + 2735829.

It is an arithmetic number, because the mean of its divisors is an integer number (6383594).

Almost surely, 2^21886604 is an apocalyptic number.

It is an amenable number.

21886604 is a deficient number, since it is larger than the sum of its proper divisors (16414960).

21886604 is a wasteful number, since it uses less digits than its factorization.

21886604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471655 (or 5471653 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 21886604 is about 4678.3120887773. The cubic root of 21886604 is about 279.7216792224.

The spelling of 21886604 in words is "twenty-one million, eight hundred eighty-six thousand, six hundred four".