21814045 has 8 divisors (see below), whose sum is σ = 28556640. Its totient is φ = 15864720.

The previous prime is 21814021. The next prime is 21814069. The reversal of 21814045 is 54041812.

It is an interprime number because it is at equal distance from previous prime (21814021) and next prime (21814069).

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

It is not a de Polignac number, because 21814045 - 2¹⁹ = 21289757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198255 + ... + 198364.

It is an arithmetic number, because the mean of its divisors is an integer number (3569580).

Almost surely, 2^21814045 is an apocalyptic number.

It is an amenable number.

21814045 is a deficient number, since it is larger than the sum of its proper divisors (6742595).

21814045 is a wasteful number, since it uses less digits than its factorization.

21814045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396635.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 21814045 is about 4670.5508240463. The cubic root of 21814045 is about 279.4122236351.

Adding to 21814045 its reverse (54041812), we get a palindrome (75855857).

It can be divided in two parts, 2181 and 4045, that added together give a palindrome (6226).

The spelling of 21814045 in words is "twenty-one million, eight hundred fourteen thousand, forty-five".