20471269 has 16 divisors (see below), whose sum is σ = 25715200. Its totient is φ = 16193520.

The previous prime is 20471267. The next prime is 20471279. The reversal of 20471269 is 96217402.

It is not a de Polignac number, because 20471269 - 2¹ = 20471267 is a prime.

It is a super-2 number, since 2×20471269² = 838145708940722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20471269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2164 + ... + 6754.

It is an arithmetic number, because the mean of its divisors is an integer number (1607200).

Almost surely, 2^20471269 is an apocalyptic number.

It is an amenable number.

20471269 is a deficient number, since it is larger than the sum of its proper divisors (5243931).

20471269 is an equidigital number, since it uses as much as digits as its factorization.

20471269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4625 (or 4611 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20471269 is about 4524.5186484310. The cubic root of 20471269 is about 273.5572662544.

The spelling of 20471269 in words is "twenty million, four hundred seventy-one thousand, two hundred sixty-nine".