20303442251 has 8 divisors (see below), whose sum is σ = 20737426944. Its totient is φ = 19869540840.

The previous prime is 20303442209. The next prime is 20303442253. The reversal of 20303442251 is 15224430302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20303442251 - 2³⁴ = 3123573067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20303442251.

It is not an unprimeable number, because it can be changed into a prime (20303442253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 932576 + ... + 954098.

It is an arithmetic number, because the mean of its divisors is an integer number (2592178368).

Almost surely, 2^20303442251 is an apocalyptic number.

20303442251 is a deficient number, since it is larger than the sum of its proper divisors (433984693).

20303442251 is a wasteful number, since it uses less digits than its factorization.

20303442251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41641.

The product of its (nonzero) digits is 5760, while the sum is 26.

Adding to 20303442251 its reverse (15224430302), we get a palindrome (35527872553).

The spelling of 20303442251 in words is "twenty billion, three hundred three million, four hundred forty-two thousand, two hundred fifty-one".