21496927 has 8 divisors (see below), whose sum is σ = 22717440. Its totient is φ = 20300280.

The previous prime is 21496913. The next prime is 21496939. The reversal of 21496927 is 72969412.

21496927 is nontrivially palindromic in base 12.

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

It is a cyclic number.

It is not a de Polignac number, because 21496927 - 2¹⁵ = 21464159 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21496927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21496957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4099 + ... + 7732.

It is an arithmetic number, because the mean of its divisors is an integer number (2839680).

Almost surely, 2^21496927 is an apocalyptic number.

21496927 is a deficient number, since it is larger than the sum of its proper divisors (1220513).

21496927 is a wasteful number, since it uses less digits than its factorization.

21496927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11933.

The product of its digits is 54432, while the sum is 40.

The square root of 21496927 is about 4636.4778657942. The cubic root of 21496927 is about 278.0516397351.

The spelling of 21496927 in words is "twenty-one million, four hundred ninety-six thousand, nine hundred twenty-seven".