21011469 has 8 divisors (see below), whose sum is σ = 28048032. Its totient is φ = 13991280.

The previous prime is 21011453. The next prime is 21011503. The reversal of 21011469 is 96411012.

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

It is not a de Polignac number, because 21011469 - 2⁴ = 21011453 is a prime.

It is a super-2 number, since 2×21011469² = 882963659075922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011869) 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, 694 + ... + 6519.

It is an arithmetic number, because the mean of its divisors is an integer number (3506004).

Almost surely, 2^21011469 is an apocalyptic number.

It is an amenable number.

21011469 is a deficient number, since it is larger than the sum of its proper divisors (7036563).

21011469 is an equidigital number, since it uses as much as digits as its factorization.

21011469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8187.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21011469 is about 4583.8268946373. The cubic root of 21011469 is about 275.9426340552.

It can be divided in two parts, 2101 and 1469, that added together give a triangular number (3570 = T₈₄).

The spelling of 21011469 in words is "twenty-one million, eleven thousand, four hundred sixty-nine".