20112442451 has 4 divisors (see below), whose sum is σ = 20112761400. Its totient is φ = 20112123504.

The previous prime is 20112442447. The next prime is 20112442459. The reversal of 20112442451 is 15424421102.

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 20112442451 - 2² = 20112442447 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 20112442451.

It is not an unprimeable number, because it can be changed into a prime (20112442459) 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, 29666 + ... + 202743.

It is an arithmetic number, because the mean of its divisors is an integer number (5028190350).

Almost surely, 2^20112442451 is an apocalyptic number.

20112442451 is a deficient number, since it is larger than the sum of its proper divisors (318949).

20112442451 is an equidigital number, since it uses as much as digits as its factorization.

20112442451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318948.

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 20112442451 its reverse (15424421102), we get a palindrome (35536863553).

The spelling of 20112442451 in words is "twenty billion, one hundred twelve million, four hundred forty-two thousand, four hundred fifty-one".