21904016386 has 8 divisors (see below), whose sum is σ = 37549742400. Its totient is φ = 9387435588.

The previous prime is 21904016371. The next prime is 21904016417. The reversal of 21904016386 is 68361040912.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782286286 + ... + 782286313.

It is an arithmetic number, because the mean of its divisors is an integer number (4693717800).

Almost surely, 2^21904016386 is an apocalyptic number.

21904016386 is a deficient number, since it is larger than the sum of its proper divisors (15645726014).

21904016386 is a wasteful number, since it uses less digits than its factorization.

21904016386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1564572608.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 21904016386 in words is "twenty-one billion, nine hundred four million, sixteen thousand, three hundred eighty-six".