20244569 has 8 divisors (see below), whose sum is σ = 21840840. Its totient is φ = 18693376.

The previous prime is 20244559. The next prime is 20244583. The reversal of 20244569 is 96544202.

It can be written as a sum of positive squares in 4 ways, for example, as 10240000 + 10004569 = 3200^2 + 3163^2 .

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 20244569 - 2⁸ = 20244313 is a prime.

It is a super-2 number, since 2×20244569² = 819685147991522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20244509) 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, 10334 + ... + 12135.

It is an arithmetic number, because the mean of its divisors is an integer number (2730105).

Almost surely, 2^20244569 is an apocalyptic number.

It is an amenable number.

20244569 is a deficient number, since it is larger than the sum of its proper divisors (1596271).

20244569 is a wasteful number, since it uses less digits than its factorization.

20244569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22539.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 20244569 is about 4499.3965150896. The cubic root of 20244569 is about 272.5437193833.

The spelling of 20244569 in words is "twenty million, two hundred forty-four thousand, five hundred sixty-nine".