21119459 has 4 divisors (see below), whose sum is σ = 21198240. Its totient is φ = 21040680.

The previous prime is 21119419. The next prime is 21119471. The reversal of 21119459 is 95491112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21119459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21119419) 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, 38987 + ... + 39524.

It is an arithmetic number, because the mean of its divisors is an integer number (5299560).

Almost surely, 2^21119459 is an apocalyptic number.

21119459 is a deficient number, since it is larger than the sum of its proper divisors (78781).

21119459 is an equidigital number, since it uses as much as digits as its factorization.

21119459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78780.

The product of its digits is 3240, while the sum is 32.

The square root of 21119459 is about 4595.5912568461. The cubic root of 21119459 is about 276.4145689916.

The spelling of 21119459 in words is "twenty-one million, one hundred nineteen thousand, four hundred fifty-nine".