20555503212 has 24 divisors (see below), whose sum is σ = 48340504576. Its totient is φ = 6797882448.

The previous prime is 20555503187. The next prime is 20555503231. The reversal of 20555503212 is 21230555502.

It is a self number, because there is not a number n which added to its sum of digits gives 20555503212.

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, 6742408 + ... + 6745455.

Almost surely, 2^20555503212 is an apocalyptic number.

It is an amenable number.

20555503212 is an abundant number, since it is smaller than the sum of its proper divisors (27785001364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20555503212 is a wasteful number, since it uses less digits than its factorization.

20555503212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13487997 (or 13487995 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 20555503212 in words is "twenty billion, five hundred fifty-five million, five hundred three thousand, two hundred twelve".