21384926 has 8 divisors (see below), whose sum is σ = 32556360. Its totient is φ = 10532808.

The previous prime is 21384907. The next prime is 21384931. The reversal of 21384926 is 62948312.

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

It is a congruent number.

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, 79661 + ... + 79928.

It is an arithmetic number, because the mean of its divisors is an integer number (4069545).

Almost surely, 2^21384926 is an apocalyptic number.

21384926 is a deficient number, since it is larger than the sum of its proper divisors (11171434).

21384926 is a wasteful number, since it uses less digits than its factorization.

21384926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159658.

The product of its digits is 20736, while the sum is 35.

The square root of 21384926 is about 4624.3838508498. The cubic root of 21384926 is about 277.5679069804.

The spelling of 21384926 in words is "twenty-one million, three hundred eighty-four thousand, nine hundred twenty-six".