20344245451 has 4 divisors (see below), whose sum is σ = 20344602600. Its totient is φ = 20343888304.

The previous prime is 20344245437. The next prime is 20344245461. The reversal of 20344245451 is 15454244302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20344245451 - 2¹⁹ = 20343721163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344245431) 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, 71881 + ... + 214138.

It is an arithmetic number, because the mean of its divisors is an integer number (5086150650).

Almost surely, 2^20344245451 is an apocalyptic number.

20344245451 is a deficient number, since it is larger than the sum of its proper divisors (357149).

20344245451 is an equidigital number, since it uses as much as digits as its factorization.

20344245451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357148.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 20344245451 its reverse (15454244302), we get a palindrome (35798489753).

The spelling of 20344245451 in words is "twenty billion, three hundred forty-four million, two hundred forty-five thousand, four hundred fifty-one".