20545653512 has 32 divisors (see below), whose sum is σ = 39542391000. Its totient is φ = 10004352000.

The previous prime is 20545653503. The next prime is 20545653533. The reversal of 20545653512 is 21535654502.

It can be written as a sum of positive squares in 4 ways, for example, as 18040250596 + 2505402916 = 134314^2 + 50054^2 .

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, 159137 + ... + 257712.

Almost surely, 2^20545653512 is an apocalyptic number.

It is an amenable number.

20545653512 is a deficient number, since it is larger than the sum of its proper divisors (18996737488).

20545653512 is a wasteful number, since it uses less digits than its factorization.

20545653512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417017 (or 417013 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 20545653512 in words is "twenty billion, five hundred forty-five million, six hundred fifty-three thousand, five hundred twelve".