20523441 has 4 divisors (see below), whose sum is σ = 27364592. Its totient is φ = 13682292.

The previous prime is 20523431. The next prime is 20523449. The reversal of 20523441 is 14432502.

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 20523441 - 2¹¹ = 20521393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20523449) 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, 3420571 + ... + 3420576.

It is an arithmetic number, because the mean of its divisors is an integer number (6841148).

Almost surely, 2^20523441 is an apocalyptic number.

It is an amenable number.

20523441 is a deficient number, since it is larger than the sum of its proper divisors (6841151).

20523441 is an equidigital number, since it uses as much as digits as its factorization.

20523441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6841150.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20523441 is about 4530.2804548946. The cubic root of 20523441 is about 273.7894603361.

Adding to 20523441 its reverse (14432502), we get a palindrome (34955943).

The spelling of 20523441 in words is "twenty million, five hundred twenty-three thousand, four hundred forty-one".