20100281522 has 4 divisors (see below), whose sum is σ = 30150422286. Its totient is φ = 10050140760.

The previous prime is 20100281479. The next prime is 20100281569. The reversal of 20100281522 is 22518200102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12846182281 + 7254099241 = 113341^2 + 85171^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5025070379 + ... + 5025070382.

Almost surely, 2^20100281522 is an apocalyptic number.

20100281522 is a deficient number, since it is larger than the sum of its proper divisors (10050140764).

20100281522 is a wasteful number, since it uses less digits than its factorization.

20100281522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050140763.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 20100281522 its reverse (22518200102), we get a palindrome (42618481624).

The spelling of 20100281522 in words is "twenty billion, one hundred million, two hundred eighty-one thousand, five hundred twenty-two".