21412653 has 8 divisors (see below), whose sum is σ = 28844928. Its totient is φ = 14127744.

The previous prime is 21412649. The next prime is 21412663. The reversal of 21412653 is 35621412.

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

It is not a de Polignac number, because 21412653 - 2² = 21412649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412663) 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, 36501 + ... + 37082.

It is an arithmetic number, because the mean of its divisors is an integer number (3605616).

Almost surely, 2^21412653 is an apocalyptic number.

It is an amenable number.

21412653 is a deficient number, since it is larger than the sum of its proper divisors (7432275).

21412653 is an equidigital number, since it uses as much as digits as its factorization.

21412653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73683.

The product of its digits is 1440, while the sum is 24.

The square root of 21412653 is about 4627.3807926299. The cubic root of 21412653 is about 277.6878170137.

The spelling of 21412653 in words is "twenty-one million, four hundred twelve thousand, six hundred fifty-three".