20541469 has 8 divisors (see below), whose sum is σ = 22168440. Its totient is φ = 18921216.

The previous prime is 20541449. The next prime is 20541497. The reversal of 20541469 is 96414502.

It can be written as a sum of positive squares in 4 ways, for example, as 632025 + 19909444 = 795^2 + 4462^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20541469 - 2¹⁹ = 20017181 is a prime.

It is a super-2 number, since 2×20541469² = 843903897355922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20541469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20541419) 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, 6009 + ... + 8785.

It is an arithmetic number, because the mean of its divisors is an integer number (2771055).

Almost surely, 2^20541469 is an apocalyptic number.

It is an amenable number.

20541469 is a deficient number, since it is larger than the sum of its proper divisors (1626971).

20541469 is a wasteful number, since it uses less digits than its factorization.

20541469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 20541469 is about 4532.2697404281. The cubic root of 20541469 is about 273.8696033598.

The spelling of 20541469 in words is "twenty million, five hundred forty-one thousand, four hundred sixty-nine".