20288469 has 8 divisors (see below), whose sum is σ = 27782560. Its totient is φ = 13160016.

The previous prime is 20288459. The next prime is 20288473. The reversal of 20288469 is 96488202.

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

It is not a de Polignac number, because 20288469 - 2¹¹ = 20286421 is a prime.

It is a super-2 number, since 2×20288469² = 823243948727922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20288419) 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, 91279 + ... + 91500.

It is an arithmetic number, because the mean of its divisors is an integer number (3472820).

Almost surely, 2^20288469 is an apocalyptic number.

It is an amenable number.

20288469 is a deficient number, since it is larger than the sum of its proper divisors (7494091).

20288469 is a wasteful number, since it uses less digits than its factorization.

20288469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182819.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 20288469 is about 4504.2723052675. The cubic root of 20288469 is about 272.7405792800.

The spelling of 20288469 in words is "twenty million, two hundred eighty-eight thousand, four hundred sixty-nine".