20344315251 has 16 divisors (see below), whose sum is σ = 29924848800. Its totient is φ = 12214222080.

The previous prime is 20344315217. The next prime is 20344315309. The reversal of 20344315251 is 15251344302.

It is not a de Polignac number, because 20344315251 - 2¹⁹ = 20343790963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20344315351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6359976 + ... + 6363173.

It is an arithmetic number, because the mean of its divisors is an integer number (1870303050).

Almost surely, 2^20344315251 is an apocalyptic number.

20344315251 is a deficient number, since it is larger than the sum of its proper divisors (9580533549).

20344315251 is a wasteful number, since it uses less digits than its factorization.

20344315251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12723206.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 20344315251 its reverse (15251344302), we get a palindrome (35595659553).

The spelling of 20344315251 in words is "twenty billion, three hundred forty-four million, three hundred fifteen thousand, two hundred fifty-one".