20982878522 has 4 divisors (see below), whose sum is σ = 31474317786. Its totient is φ = 10491439260.

The previous prime is 20982878491. The next prime is 20982878533. The reversal of 20982878522 is 22587828902.

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., 16540789321 + 4442089201 = 128611^2 + 66649^2 .

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, 5245719629 + ... + 5245719632.

Almost surely, 2^20982878522 is an apocalyptic number.

20982878522 is a deficient number, since it is larger than the sum of its proper divisors (10491439264).

20982878522 is a wasteful number, since it uses less digits than its factorization.

20982878522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10491439263.

The product of its (nonzero) digits is 2580480, while the sum is 53.

The spelling of 20982878522 in words is "twenty billion, nine hundred eighty-two million, eight hundred seventy-eight thousand, five hundred twenty-two".