20551108 has 6 divisors (see below), whose sum is σ = 35964446. Its totient is φ = 10275552.

The previous prime is 20551073. The next prime is 20551129. The reversal of 20551108 is 80115502.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 1871424 = 4322^2 + 1368^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2568885 + ... + 2568892.

Almost surely, 2^20551108 is an apocalyptic number.

It is an amenable number.

20551108 is a deficient number, since it is larger than the sum of its proper divisors (15413338).

20551108 is a wasteful number, since it uses less digits than its factorization.

20551108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5137781 (or 5137779 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 20551108 is about 4533.3329901961. The cubic root of 20551108 is about 273.9124340568.

The spelling of 20551108 in words is "twenty million, five hundred fifty-one thousand, one hundred eight".