20463120251 has 48 divisors (see below), whose sum is σ = 25430436000. Its totient is φ = 16370726400.

The previous prime is 20463120229. The next prime is 20463120257. The reversal of 20463120251 is 15202136402.

It is a happy number.

It is not a de Polignac number, because 20463120251 - 2¹⁴ = 20463103867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20463120251.

It is not an unprimeable number, because it can be changed into a prime (20463120257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25293935 + ... + 25294743.

It is an arithmetic number, because the mean of its divisors is an integer number (529800750).

Almost surely, 2^20463120251 is an apocalyptic number.

20463120251 is a deficient number, since it is larger than the sum of its proper divisors (4967315749).

20463120251 is a wasteful number, since it uses less digits than its factorization.

20463120251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212 (or 1205 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20463120251 its reverse (15202136402), we get a palindrome (35665256653).

The spelling of 20463120251 in words is "twenty billion, four hundred sixty-three million, one hundred twenty thousand, two hundred fifty-one".