20253352121 has 4 divisors (see below), whose sum is σ = 21133932672. Its totient is φ = 19372771572.

The previous prime is 20253352099. The next prime is 20253352181. The reversal of 20253352121 is 12125335202.

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.

It is a cyclic number.

It is not a de Polignac number, because 20253352121 - 2⁶ = 20253352057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20253352181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440290241 + ... + 440290286.

It is an arithmetic number, because the mean of its divisors is an integer number (5283483168).

Almost surely, 2^20253352121 is an apocalyptic number.

It is an amenable number.

20253352121 is a deficient number, since it is larger than the sum of its proper divisors (880580551).

20253352121 is an equidigital number, since it uses as much as digits as its factorization.

20253352121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880580550.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 20253352121 its reverse (12125335202), we get a palindrome (32378687323).

The spelling of 20253352121 in words is "twenty billion, two hundred fifty-three million, three hundred fifty-two thousand, one hundred twenty-one".