20988452779522 has 8 divisors (see below), whose sum is σ = 32568288795900. Its totient is φ = 10132356514224.

The previous prime is 20988452779513. The next prime is 20988452779561. The reversal of 20988452779522 is 22597725488902.

It can be written as a sum of positive squares in 2 ways, for example, as 20011674380481 + 976778399041 = 4473441^2 + 988321^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180934937697 + ... + 180934937812.

Almost surely, 2^{20988452779522} is an apocalyptic number.

20988452779522 is a deficient number, since it is larger than the sum of its proper divisors (11579836016378).

20988452779522 is a wasteful number, since it uses less digits than its factorization.

20988452779522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361869875540.

The product of its (nonzero) digits is 406425600, while the sum is 70.

The spelling of 20988452779522 in words is "twenty trillion, nine hundred eighty-eight billion, four hundred fifty-two million, seven hundred seventy-nine thousand, five hundred twenty-two".