21114653 has 4 divisors (see below), whose sum is σ = 24131040. Its totient is φ = 18098268.

The previous prime is 21114649. The next prime is 21114659. The reversal of 21114653 is 35641112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21114653 - 2² = 21114649 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508183 + ... + 1508196.

It is an arithmetic number, because the mean of its divisors is an integer number (6032760).

Almost surely, 2^21114653 is an apocalyptic number.

It is an amenable number.

21114653 is a deficient number, since it is larger than the sum of its proper divisors (3016387).

21114653 is an equidigital number, since it uses as much as digits as its factorization.

21114653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016386.

The product of its digits is 720, while the sum is 23.

The square root of 21114653 is about 4595.0683346388. The cubic root of 21114653 is about 276.3936001905.

Adding to 21114653 its reverse (35641112), we get a palindrome (56755765).

The spelling of 21114653 in words is "twenty-one million, one hundred fourteen thousand, six hundred fifty-three".