20090575 has 6 divisors (see below), whose sum is σ = 24912344. Its totient is φ = 16072440.

The previous prime is 20090561. The next prime is 20090599. The reversal of 20090575 is 57509002.

It is not a de Polignac number, because 20090575 - 2¹⁷ = 19959503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401787 + ... + 401836.

Almost surely, 2^20090575 is an apocalyptic number.

20090575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20090575 is a deficient number, since it is larger than the sum of its proper divisors (4821769).

20090575 is an equidigital number, since it uses as much as digits as its factorization.

20090575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803633 (or 803628 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 20090575 is about 4482.2511085391. The cubic root of 20090575 is about 271.8509085976.

Adding to 20090575 its reverse (57509002), we get a palindrome (77599577).

The spelling of 20090575 in words is "twenty million, ninety thousand, five hundred seventy-five".