20520784108 has 24 divisors (see below), whose sum is σ = 39394918080. Its totient is φ = 9275515920.

The previous prime is 20520784061. The next prime is 20520784127. The reversal of 20520784108 is 80148702502.

It is a super-2 number, since 2×20520784108² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294866 + ... + 1310617.

It is an arithmetic number, because the mean of its divisors is an integer number (1641454920).

Almost surely, 2^20520784108 is an apocalyptic number.

It is an amenable number.

20520784108 is a deficient number, since it is larger than the sum of its proper divisors (18874133972).

20520784108 is a wasteful number, since it uses less digits than its factorization.

20520784108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605677 (or 2605675 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 20520784108 in words is "twenty billion, five hundred twenty million, seven hundred eighty-four thousand, one hundred eight".