20105255908 has 6 divisors (see below), whose sum is σ = 35184197846. Its totient is φ = 10052627952.

The previous prime is 20105255879. The next prime is 20105255959. The reversal of 20105255908 is 80955250102.

It can be written as a sum of positive squares in only one way, i.e., 19108085824 + 997170084 = 138232^2 + 31578^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2513156985 + ... + 2513156992.

Almost surely, 2^20105255908 is an apocalyptic number.

It is an amenable number.

20105255908 is a deficient number, since it is larger than the sum of its proper divisors (15078941938).

20105255908 is a wasteful number, since it uses less digits than its factorization.

20105255908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026313981 (or 5026313979 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The spelling of 20105255908 in words is "twenty billion, one hundred five million, two hundred fifty-five thousand, nine hundred eight".