20522234251 has 4 divisors (see below), whose sum is σ = 20909446272. Its totient is φ = 20135022232.

The previous prime is 20522234237. The next prime is 20522234351. The reversal of 20522234251 is 15243222502.

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 20522234251 - 2⁷ = 20522234123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522234351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193605931 + ... + 193606036.

It is an arithmetic number, because the mean of its divisors is an integer number (5227361568).

Almost surely, 2^20522234251 is an apocalyptic number.

20522234251 is a deficient number, since it is larger than the sum of its proper divisors (387212021).

20522234251 is an equidigital number, since it uses as much as digits as its factorization.

20522234251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387212020.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 20522234251 its reverse (15243222502), we get a palindrome (35765456753).

The spelling of 20522234251 in words is "twenty billion, five hundred twenty-two million, two hundred thirty-four thousand, two hundred fifty-one".