20280561922 has 8 divisors (see below), whose sum is σ = 30439707516. Its totient is φ = 10133992752.

The previous prime is 20280561913. The next prime is 20280561923. The reversal of 20280561922 is 22916508202.

It can be written as a sum of positive squares in 2 ways, for example, as 16856088561 + 3424473361 = 129831^2 + 58519^2 .

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

It is a super-2 number, since 2×20280561922² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20280561923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3140073 + ... + 3146524.

Almost surely, 2^20280561922 is an apocalyptic number.

20280561922 is a deficient number, since it is larger than the sum of its proper divisors (10159145594).

20280561922 is a wasteful number, since it uses less digits than its factorization.

20280561922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6288212.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 20280561922 in words is "twenty billion, two hundred eighty million, five hundred sixty-one thousand, nine hundred twenty-two".