20540269 has 8 divisors (see below), whose sum is σ = 21189888. Its totient is φ = 19899600.

The previous prime is 20540251. The next prime is 20540279. The reversal of 20540269 is 96204502.

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 20540269 - 2⁷ = 20540141 is a prime.

It is a super-2 number, since 2×20540269² = 843805301184722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540209) 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, 2584 + ... + 6910.

It is an arithmetic number, because the mean of its divisors is an integer number (2648736).

Almost surely, 2^20540269 is an apocalyptic number.

It is an amenable number.

20540269 is a deficient number, since it is larger than the sum of its proper divisors (649619).

20540269 is a wasteful number, since it uses less digits than its factorization.

20540269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 20540269 is about 4532.1373544940. The cubic root of 20540269 is about 273.8642702468.

The spelling of 20540269 in words is "twenty million, five hundred forty thousand, two hundred sixty-nine".