20526249 has 4 divisors (see below), whose sum is σ = 27368336. Its totient is φ = 13684164.

The previous prime is 20526239. The next prime is 20526257. The reversal of 20526249 is 94262502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20526249 - 2⁵ = 20526217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20526239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3421039 + ... + 3421044.

It is an arithmetic number, because the mean of its divisors is an integer number (6842084).

Almost surely, 2^20526249 is an apocalyptic number.

It is an amenable number.

20526249 is a deficient number, since it is larger than the sum of its proper divisors (6842087).

20526249 is an equidigital number, since it uses as much as digits as its factorization.

20526249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842086.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20526249 is about 4530.5903588826. The cubic root of 20526249 is about 273.8019463149.

The spelling of 20526249 in words is "twenty million, five hundred twenty-six thousand, two hundred forty-nine".