21414023 has 4 divisors (see below), whose sum is σ = 21654720. Its totient is φ = 21173328.

The previous prime is 21413993. The next prime is 21414037. The reversal of 21414023 is 32041412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21414023 - 2¹⁶ = 21348487 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21413992 and 21414010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414053) 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, 120215 + ... + 120392.

It is an arithmetic number, because the mean of its divisors is an integer number (5413680).

Almost surely, 2^21414023 is an apocalyptic number.

21414023 is a deficient number, since it is larger than the sum of its proper divisors (240697).

21414023 is an equidigital number, since it uses as much as digits as its factorization.

21414023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240696.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 21414023 is about 4627.5288221685. The cubic root of 21414023 is about 277.6937391228.

Adding to 21414023 its reverse (32041412), we get a palindrome (53455435).

The spelling of 21414023 in words is "twenty-one million, four hundred fourteen thousand, twenty-three".