20102222451 has 16 divisors (see below), whose sum is σ = 26988691968. Its totient is φ = 13308672000.

The previous prime is 20102222443. The next prime is 20102222453. The reversal of 20102222451 is 15422220102.

It is not a de Polignac number, because 20102222451 - 2³ = 20102222443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102222453) 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 15 ways as a sum of consecutive naturals, for example, 2528755 + ... + 2536691.

It is an arithmetic number, because the mean of its divisors is an integer number (1686793248).

Almost surely, 2^20102222451 is an apocalyptic number.

20102222451 is a deficient number, since it is larger than the sum of its proper divisors (6886469517).

20102222451 is a wasteful number, since it uses less digits than its factorization.

20102222451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13682.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 20102222451 its reverse (15422220102), we get a palindrome (35524442553).

The spelling of 20102222451 in words is "twenty billion, one hundred two million, two hundred twenty-two thousand, four hundred fifty-one".