20433125251 has 8 divisors (see below), whose sum is σ = 25475065344. Its totient is φ = 15921915720.

The previous prime is 20433125233. The next prime is 20433125261. The reversal of 20433125251 is 15252133402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20433125251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20433125261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132682555 + ... + 132682708.

It is an arithmetic number, because the mean of its divisors is an integer number (3184383168).

Almost surely, 2^20433125251 is an apocalyptic number.

20433125251 is a deficient number, since it is larger than the sum of its proper divisors (5041940093).

20433125251 is a wasteful number, since it uses less digits than its factorization.

20433125251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265365281.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 20433125251 its reverse (15252133402), we get a palindrome (35685258653).

The spelling of 20433125251 in words is "twenty billion, four hundred thirty-three million, one hundred twenty-five thousand, two hundred fifty-one".