20025653 has 4 divisors (see below), whose sum is σ = 20048640. Its totient is φ = 20002668.

The previous prime is 20025637. The next prime is 20025661. The reversal of 20025653 is 35652002.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35652002 = 2 ⋅17826001.

It is a cyclic number.

It is not a de Polignac number, because 20025653 - 2⁴ = 20025637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10133 + ... + 11946.

It is an arithmetic number, because the mean of its divisors is an integer number (5012160).

Almost surely, 2^20025653 is an apocalyptic number.

It is an amenable number.

20025653 is a deficient number, since it is larger than the sum of its proper divisors (22987).

20025653 is an equidigital number, since it uses as much as digits as its factorization.

20025653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22986.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20025653 is about 4475.0031284905. The cubic root of 20025653 is about 271.5577670007.

Adding to 20025653 its reverse (35652002), we get a palindrome (55677655).

The spelling of 20025653 in words is "twenty million, twenty-five thousand, six hundred fifty-three".