20995550404 has 6 divisors (see below), whose sum is σ = 36742213214. Its totient is φ = 10497775200.

The previous prime is 20995550393. The next prime is 20995550431. The reversal of 20995550404 is 40405559902.

It can be written as a sum of positive squares in only one way, i.e., 15165922500 + 5829627904 = 123150^2 + 76352^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2624443797 + ... + 2624443804.

Almost surely, 2^20995550404 is an apocalyptic number.

It is an amenable number.

20995550404 is a deficient number, since it is larger than the sum of its proper divisors (15746662810).

20995550404 is a wasteful number, since it uses less digits than its factorization.

20995550404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248887605 (or 5248887603 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 20995550404 in words is "twenty billion, nine hundred ninety-five million, five hundred fifty thousand, four hundred four".